Yes development can have huge upside but I have also seen people lose $20M in a development deal gone bad. 

I learned that April and May are seasonally slow for rentals, since most people seem to move in the summer, and also that the market here in Wesley Chapel, FL is a bit saturated with excess inventory from all the new construction activities in the area.Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

You seem pumped up to do this, but do it first at a local meetup (in terms of connecting with people) or else you are just going to get a bunch of people trying to sell you services or on how good they are.

Looks like these people would stay with me a few years, and I expect school taxes to go up that much each year.

I didn't even know they could do that.They are the shadiest people I have ever been forced to work with and I wouldn't wish them on my worst enemy.

To fill a vacant mobile home park lot typically requires bringing in a home and selling it, while filling a vacant RV park lot simply means somebody pulls in their motorhome or travel trailer.Think of RV parks more like owning a restaurant (and the hands-on management that entails) while owning a mobile home park is more like owning a parking lot that rents spaces out monthly and is much more passive in management.Some people just prefer one business model over the other.

More importantly, there no great bargains there…people are paying at or close to market value.

So like I mention in another comment, many people use business credit cards with 9-12 months 0% interest to make their down payment.

Basically to buy a property below market value, add value/equity, rent, and refinance, however, I do want to draw out a lot of my capital or leave at most 20-30k in the property (or whatever the more experienced people think). 

Along side that with the connections I have already made and my joy for meeting new people growing my portfolio is also on the table.Looking forward to connecting and growing together!