I have written to the builder asking them to cure this issue, but I must say that this builder has been very difficult to get anything done.

Finding this quite frustrating, trying to do the right thing and its difficult

Overall, not too bad, not difficult by any means, but annoying at times. 

I will word your statement to be historically more accurate: it has been historically difficult to not get a good ROI.best wishes

Talk about difficult to find cashflow!

Starting points within the last 36 months could very well end up in the 5-10% of starting points where floating lost.And I think that’s where we sit today—the inverted yield curve is making floaters difficult to pencil.  

How difficult a process is foreclosing on an empty lot? 

Evidently, you are suffering the "Groves" effect and distorting the truth and reality of things, unless what you really mean is that you have the "skills and mindset", but you have not put them to the practice yet.Selling real estate education is easy, being a real estate investor is very difficult, and you are a clear example of it, 13 years down the line and you still pay someone like the Groves, to take your money just to give you "mindset" and motivation. 

A lot of Mid term rentals are for 90+ days stays so it may be difficult to manage if your parents are also staying there some.

You are making this difficult when it isn't.