The cost of an app isn't just the amount of man-hours*salary required to program an app. I feel that this is a trap that inexperienced engineers fall into often. Once you start building a business, there are many, many aspects that are a time-drain, and if you charge your customer solely based on the amount of time you spend coding -- rather than the amount of time actually working on the business -- you are short-changing yourself.
But you didn't.
What's this thing with having an app for every silly little thing? One would hope that the definitive map of public rights of way is kept somewhere, and the thing to do would be to get a copy.
Perhaps one could even draw a new map with just the public beach accesses and publish that. That would cost way less than 30 kUSD. But, no, in Silly Valley, everything has to be an app.
Also, Silly Valley is a bit north of Malibu, ~300 miles north.
(Also, I hope developers don't sell themselves so cheap.)