as far as cash vs cashless goes, couple things to think about:
1. are you going to be on site most of the time or do you plan to build and check on it once a day/week? if you're going to be on site most of the time you'll be able to resolve any bill jam issues right away so i would go cash in that case.
2. do you plan to build up your
membership? if you think your main model is
membership revenue, going cashless makes sense because people who use cash will not sign up for a
membership.
as years go by we are losing more and more of the older generation who live and die by cash is king motto. im not quite sure we're there yet.
accounting-wise there are benefits for sticking with cash i imagine if you know what i mean
once youre up and running keep us updated. i've been thinking about a very similar setup so i would love to reach out if i get the opportunity to build one from ground up for advice.