I thought about a RV park myself. One thing that is important for new parks is Wi-Fi. Having antennas powerful enough to get through the Faraday cages of rigs is important, otherwise even if you offer Shangri-La on earth, you will get one star if people can't play their video game consoles or stream 4K video. Not just antennas, subnets, and a large pipe to a nearby ISP... which can be very expensive if you are located away from fiber backhauls.
Then, you have to have network security, logging, because eventually, someone will come to your RV park and do something bad, and if you can't produce logs pointing to someone, it may be that your park gets considered culpable. Things like blocking outgoing port 25, so people can't spam from your park, blocking incoming port 80 and other ports, so people can't set up servers, and so on.
If I did anything RV park related, I'd probably just have a chunk of land, fenced in, with an "Iron Ranger" fee collection box for donations to cover umbrella insurance. This would be for people I know, and would be intended for boondocking and layover.
