I've heard from some pretty reputable sources: @Brandon Turner and @Kyle R.

Hey BP!!Wondering if anyone could help me with a reliable GC/Foundation Expert in the Milwaukee metro area. Currently have a accepted cash offer on a house that may have some foundation issues and need a additional qu...

There is a lot of free information on here and on the web that can at least get you educated a little more on real estate. 

Simply click on my name in blue then scroll down to REI Weal Builders and the web address of the group OR whichever LinkedIn group you're interested in.

there was a lot of failures in this model with some of the poorer providers who are no longer in business. this led most TK operators to only offer product post rehab and many with tenant in place.. of course the holding costs of doing this must be backed into the end price.So if you can find a VERY good and reputable company that can do pre hab type deals you should be able to get a better buy as it relates to basis in the property.  

If he is good, and has built a reputation, he will save you more than the extra that you are paying him.

I would make sure its a reputable company.  

There are actually a ton of reputable wholesalers in St Louis.

As another datapoint, I frequently check the web traffic of the big players as a proxy of popularity, investor views, etc.  

Web Developer checking in here.