Use the calculators they have here (BP) to make sure you are in at a good basis.  

I understand the draw of an RV park and the need for hook-ups, and tent campers are happy with community bathroom/shower--reducing infrastructure cost--but it takes an awfully long time to recoup the 30-35,000 all-in cost per Tiny House, especially if you calculate the modest additional income you'll make over just providing a pretty, rustic tent site.  

When you are analyzing a deal, how much increase in property taxes do you calculate in for each year?

Definitely, love the ambition just make sure you take calculate risk...

I ran all the numbers through the flip calculator and being very conservative with all the numbers I'm still looking over 20k profit.

If I can raise the rents to $3900 total, using the bigger pockets calculator it looks like I'll get just under $1,000 net income after all expenses per month.

The point is that your time is worth something, and don't give it away for free when you're making calculations to see if a deal is worthwhile. 

I know that obviously the intention is to make money every time, but of course unforeseen things can always come up (repairs ended up being more costly than you had calculated, you have trouble selling it for a profitable price for whatever reason, etc).

You need to do a Total of Payment Calculation for both terms and rates and compare it to your strategy about holding the property.

That is not to say that tax consequences should not be considered, just not in this ROI calculation.