Here in Oki we have a popular local on line classified ad thing which is free and I frequently check the bike section for deals.
Couple days ago I came upon a Park Tool PCS-11 work stand. For the most part on a regular bike I can make do with those cheap V shaped stands that slip over the wheel hubs for routine maintenance such as cleaning.
But yesterday I was stripping a bike and working on a folding hinge and subsequently rebuilding everything.
The work stand was in a word INVALUABLE. It clamped the top tube of the folding bike without pinching the shifter or rear brake cables.
I repositioned the bike a dozen times or more to get the optimum ergonomics to suit me rather than bending over or stretching. Moving and adjustment of the stand was remarkable easy and secure.
Fold down and storage size is impressive as well. Overall weight is advertised at 14 pounds but it's very sturdy and seems strong beyond it's advertised weight.
If you don't have a good maintenance stand, get one. I realize now I've been floundering for a year or two since getting back into bicycles.
While I see a good stand useful for any bike it's even more so useful for a folding bike especially when working on the bike hinge even if it's just for cleaning or lubricating.