In that regard I have available to me more knowledge about modeling cash flow and benefits of entity structure regarding liability and taxes than the average person.

I'm not beating myself up over it since it still fits into my business model and cash flows 15%+.

Do your research and make a good business decision based off of that and hopefully build a strong business model for the future.I rarely have a keyboard in front of me and usually do short replies on my phone.  

You are free to spend $800 worth of time and energy to save losing $100 if that supports your business model all you want.

You keep selling model homes over and over to buyers and can make six figures doing it.

Apparently, the theoretical models showed that passive house standards would cost just a little more than normal building costs to get much better energy efficiency, BUT when it was actually put into practice it turns out that the passive house building codes cost LESS than the previous standards to build and are more energy efficient.  

I suspect there's so much vacant land in TX this model just won';t pan out

I’m estimating the re model will cost 10k (so plan for 13), and the additional property about 17K with around 10k re modeling.I’m unsure if I should seek two loans one for each house or bundle them together.

Both are great models.

The answer is to change your model slightly from a fix n flip model to a fix n rent n evaluate model.