I'm building up a folding bike. Its main use would be for exploration. Not a big mountain biker, so it would likely mostly stay in car trunks and city streets.

Am searching for a fork right now. It looks like most rigid forks that are halfway decent are in the lower $100's.

Thinking maybe a suspension fork because weight might not be as big a difference and it might be useful.

So first of all, is a suspension fork worth it if you are mainly touring around

and secondly, what to look for in a suspension fork and what are some good low-cost options?