From the little I know of San Antonio (I am a wholesaler who specializing in selling STRs nationwide) its not a super hot Airbnb market but the amount you expect for rent sounds pretty conservative. 

My average conservative deal creates about 70k in equity.

I am very conservative so I want to be careful in how I frame expectations. 

Take the win, be conservative, and don't conflate a bull market for your genius.

If I am all in on the property for 360k (purchase and some finishing construction as well as carry costs) and the home is valued at 450k or more (based on what im told by agents as well as my own analysis while staying conservative), that is 20%+ equity I believe, unless I am missing something.

He is a very conservative investor and gives excellent advice which helped me a lot.

We can say with confidence that those buyers will not consider the financials rosy, but conservative.

While it’s possible the machines could keep on chugging for years to come, I always like to take the conservative approach.

Clearly there's a lot more ROI and work for a BRRRR.After finishing David Greene's BRRRR book and combing the forums, my impression is it'll come down to building the right team and doing our due diligence on finding and analyzing deals, estimated ARV, rehab costs, and rent /demand for an area with the most conservative estimates. 

Be conservative because demand can go up or down at any time as can the laws -- a good general rule of thumb for STR is to make sure it still makes sense as an LTR.