Hobby shops sell unfinished pine boxes for a few bucks. Some are quite ornate.
Edit: I only have a modest collection. I keep mine loaded but locked out ready to go. Every night I take a different couple of lights outside and take a walk. This way they all actually get some use rather than just sit in boxes. This has the added benefit of satisfying my urge for something new and refreshes my memory of the different UIs.
My lights on rotation are all on top of the computer desk in my bedroom. Two currently unused ones (both Thrunites, one TN12 2014 and one Ti3) are inside my accessories & parts bin.
I just bought the cheaper version of a Pelican from Harbor Freight. Apache 3800. It also has the pick and pluck foam to allow for customization.
I have no system.
A few that I like the most are in Meija waterproof case (“like” Pelican but less $:money_mouth_face:.
Most are on a shelf in the closet or hanging by wrist lanyard in same closet. Most of the AAA and AA lights are near my bedstand.
Zanflare F2 hangs by back door but is rarely used.
MecArmy X2S clipped to my work backpack.
Oh yeah, and SP70 in my sock drawer. No good reason why.
Testament to no system (and general bad memory) - I am missing Eagletac D25C Ti. Where the heck did I leave that thing?
All my box-queens are just that, in their original boxes and stored in bigger “banker boxes” and the like.
Everything else I have near me on my table… 8 lights and 2 “lanterns”.
Other somewhat lesser-used lights I have in sling-bags, ready for when I’d need ’em (Cometa, WK30, UV-S2+., etc.), but I keep them protected.
Sorted in nice boxes, somewhat in chronological order, and on bookshelf (bedroom). The working units dispersed about the house, workshops, tool chests and pouches.
I have a system.
We finally hit critical mass with about six lights around the house in areas where they are now expected to be always (and charged always… wife keeps me reminded of course) 
Humph… this used to be my “geek” habit, then I started RELYING on all these lights and so having them in a “spot” where they should be is the new norm this year (especially with Covid with more time around the house for us both).
But the “expanded” selection has a nice oak shelf with books to the back and a row of lights (Queens) across part of the 3 ft. wide front- they tuck in nicely with a few inches of shelf space in front. Then there is a desk drawer for the boxed lights I never use, but gift often.
The hunting bag has two for the rifle always ready to go too. Couple in cars too… but the back door gets the most use after dark. That is my “rotation” spot between newer lights that come in… and the C8F that holds a permanent spot there with weekly guest visitor lights next to it for a week or two (currently an IF25a) THUMBS-UP:
The surprise addition this year also was the pair of LT1 lanterns that live on each nightstand at all times now. Started out that they’d be used until when I am hunting… but I have been informed that I should buy another LT1 as my wife doesn’t think she’ll be letting her’s go on long winter nights (when she’s in bed with two cats and a dog and I am freezing in a tent somewhere) 
I’m at a point of disrespect that the older lights I have are all piled up in one drawer.
Don’t shake em! Or I’ll scratch my lights haha
But the useful ones are always within reach especially on my PC table. Others are hanging everywhere around my house
I have a couple small wall-mount shelves inside the door of my bedroom that keep a lot of the current active lights. Otherwise there’s a few scattered here and there, and four on my nightstand…
The shelves by the bedroom door served as a nice loading space after I got dressed for work, I’d pause there and pick what I was going to carry that day.
First of all, weren’t not an organization. Secondly its none of your business.
I don't keep any torches in my kitchen: https://budgetlightforum.com/t/-/72875
I keep them on my hip, in my safe, in the car, on my coffee table that replaced my nightstand, because it was too small for my flashlights, in my tool box, in the bathroom, in the office, everywhere but in the kitchen.
Keep them in the refrigerator… Fresh, ready to use delicious flashlights 
Most of them are in my desk drawers. Others are in the bedroom, kids bedroom, kitchen, on my keys.... I keep forgetting putting 1 in my car.... which must be a USB rechargeable light... for emergencies.
Scattered around where needed, but as I have multiples of ones I like or were bought on sale (like lots of Convoy S2), those got wrapped in 3 layers of heavy duty foil and put into the stainless steel tool box my wife bought waiting for the next CME or EMP.
Well, since freedom day about 4 months back I can keep them anywhere in the house I want.
1 by the front door.
2 next to the slider in the back. Back yard buts against forest land. so a flooder and a thrower.
3 in the garage, one hanging by the mandoor.
3 in the car, because reasons.
2 on the nightstand.
a few in the kid’s room because she likes one to flood the rooms with light the other is to bop them on the head before she stuffs them in the freezer.
a couple in the safe because inside a safe is dark.
One on the bump in the night stick.
My office? Yeah … Lets just say there are a few in there too.
This is not including the one in my satchel or my EDC.
If I remember correctly OL or one of the OG’s had curios cabinets with 2-4 shelves full of lights.
Less is more in storage. If you buy a pelican case or build a cabinet, you again lose space. Just putting each in a sandwich bag and stacking them in a box in the closet takes the least space. But honestly, my recommendation would be to sell all but your favorites. Then you GAIN space.
For more flashlights….