I have been considering which area of REI to begin with: multifamily homes, mobile home parks, or short-term rentals.

Does anyone have any insurance companies they've used for insuring a mobile home community with a lagoon?

The good thing about purchasing an RV Park / Mobile home park is that potentially, a good portion of the purchase price will be eligible for bonus depreciation.This assumption is assuming you don't own most of the mobile homes but moreso the park and lease out the land.Best of luck.

Someone has a mobility disability?

At my ski resort Airbnbs, we have portables.  

We plan to build on our “Deal Finder”, introduce a mobile app, and build out solutions to help investors meet contractors, lawyers, wholesalers (avoiding wannabes who just bought some guru course), and maybe foray into commercial - allowing investors to connect with Commercial Brokers. 

Are you investing in mobile homes, commercial triple net, or multi family?

If they don't need an "official" floor plan, there is a free app where you walk around the room with your mobile device pointed at where the floor and wall meets.

They setup to assist clients from all over the US and have great online/mobile banking system so you don't even need to go to a branch for your banking needs.

Mobile homes and such?