I understand the 25k guy .. and the seller carry back folks normally those I see that do that will get the amount they paid for the dirt back in the down payment and the note is pure profit.

I do not know the market very well in Gatlinburg, but from a pure investment perspective (assuming revenue is gross) is abysmal. 

Instead, you must invest in a purely passive way, such as a syndication.Second, real estate is a tax-favored asset and investing in a tax-favored asset through a tax-deferred vehicle is a bad idea. 

Also, they are purely a capital investor then they won't want to do the work and merely want to have faith in their ROI

Basically, from what I've seen (and this is purely anecdotal), they're not really going to go out past one, maybe two miles, unless there simply is no truly comparable property.

At this stage I do not know if responsibility for necessary termite infestation treatment is determined purely by the articles of association and other incorporation documents of the HOA or are the HOA directors in direct breach of any Broward County, Florida State or Federal laws in not doing anything about the ( apparently widespread ) termite problem in the community ?

There are more factors than just pure cashflow and it seems like you are in a good position to be successful.  

Fixed income, like lending, is not purely about yield from interest charged.

From a pure investment standpoint, I hate the party pooper but I fear that, if you want to do property development in Tulum, you are too late to the party.

I self-manage and produce $700 in pure cash flow each month.Lessons learned?