Maybe you just want to fix up places and do flips.I would consider reading this beginner's guide, it is a lot of information but will help you get a good over view of different niches, financing and education. 

They ask for 50% upfront, material costs (or combination), and they prefer cash. 

It's a pretty murky niche and everyone does it a little differently, so we don't want to give platform to anyone that may give risky advice.

(So, do you really have a PREFERRED return?) 

It's data + personal preference + which way is this block trending (D+ to C or C to D+).

The BRRRR strategy is my preferred way to buy and I have wroked that strategy many times.

EB is great source of renters with solid incomes and I have found that our EB renters seem to prefer our listings in Groton being closer to EB and in some cases walking distance.

Since the adjustment, we have not been paid in full on the first of the month.In my experience, it is generally preferable to rent to lower income folks with no credit that are typically found in the same neighborhoods, such as recent immigrants.

This is still preferable to platforms like Airbnb where there may be more fees depending on how much of the fees you pass through to the tenant via your pricing.

I would suggest doing a google search and see what you can find, and maybe even call up some people that have a successful STR treehouse or preferably a treehouse village.