- What's the licensing look like? Can I buy it once & use it on every project?

- When you say "a UI", what are we talking about above & beyond what Bootstrap gives me?

- Since it's a stock app, and not an engine/gem, how am I going to easily merge back in your bugfixes?

- Is this just for a one-time purchase? What kind of support do you have for recurring billing?

Looking at what you've laid out so far, I'd probably be billing ~2-3 hours for it, so the pricing sorta lines up there, assuming it supports multiple recurring subscription plans, gives me a decent reporting interface, coupon codes, all the nice things that Stripe gives for me out of the box.

As somebody who's built this a number of times before for clients, both before & after the Stripe era, there was definitely a recoil when I saw the price.

Part of my recoil can probably be attributed to having inherited a RailsKitted-project in the past.