Architecture fees alone are going to $30k+ on a $600k building.

It doesn’t really matter....she will get the surplus above the $375k.....if someone buys it at the auction for $900k, is the same thing as her selling it herself, and maybe with less fees.

However after condo fees would it really be cheaper? 

In Texas, it doesn't cost extra to make a series LLC when you form it or renew it annually (in Texas we don't even have renewal fees).

Sounds like he is somewhat successful, but it could be because of the amount of people paying $997 to sign up plus $97/month coaching fee (not sure if the cost is still the same from what was said 10 years ago) https://www.biggerpockets.com/...

I don’t want to make the mistake of setting up an LLC or S-Corp too late and running into problems, but I don’t want to deal with fees and a ton of paperwork for a business that isn’t creating income yet.

That doesn't necessarily mean a paid membership here, but the point is that denigrating memberships is really just saying "I don't think what I want to achieve, or offer, is worth paying the Pro membership fee", which is about $20 per month.

You can collect the buyer side commission from the seller of the house, plus an assignment fee from the investor.You may want to discuss this business model with @Roy Cleeves.

If the Seller requires 10% down, that should be enough to pay the agent their fee for the sale.

Typically you need an exit strategy for any HML because you don't want to pay the points/fees for a long period of time, as that will eat into your profits.