Also worth noting, unlike the stock market where you can buy into the broader market and the market price is set, real estate you are buying a single specific deal where prices are not set.

I had 2 criteria when i was buying my primary resident and one was that the bathroom had a window.   

But they put on things specific to the foreclosure being done property like the power of attorney for the foreclosing company to act for the bank owner. 

I was wondering if anybody had some area specific issues to keep an eye for and what are the BIG problems to avoid.

Don't know this specific "mentor" but I would typically advise to steer away from them.

Other than Mashvisor, are there any other tools that can automatically filter out any new MLS listing based on my criteria (e.g rent avg, cap rate, expense)?

These factors make it an attractive option for your investment criteria, balancing cash flow and appreciation prospects in a stable economic environment.

Keep renting it out and deal with the tax implications, move back in and aim for that tax break on selling later, or sell and possibly pay capital gains tax if he doesn't meet the criteria for the exemption.

Just posted yesterday some more specifics where new construction is starting to creep in.

My understanding of equal housing requirements are that you must accept the first applicant that meets your documented acceptance criteria.