Agro
(Agro)
54
I haven’t thought about that.
Quick estimation:
My large tent (the one that matters) has 10 guy lines. Say 15m total length.
Cut a 20m string into sections, wire together to a single USB plug, add some resistor to reduce output….sounds like an interesting solution. 
More involved than I’m willing to do now but I’ll keep that in mind for later. Thank you for this hint. 
As to strings themselves - Ali is still cheaper than even these deals (and for me - much easier as well). My recent purchase was a 20m remotely controlled string for $3.64