Preforeclosure/foreclosure -I'd also say any leveraged type of deals that someone is a middle man/wholesaler is tough as you are up against buyers with plenty of money to close 

Listen to every podcast, get familiar with the calculators found here, goto meet ups, and ask plenty of questions.

Plenty of 2br units  around here for only 700ish. 

Most of my renters are people that make plenty of income to afford it but have less than stellar credit and therefore can't (and likely never will) qualify for a mortgage.

It's like drinking water from a fire hose.

I'm not an expert on the matter, but if you do a search, you'll find plenty of posts on the matter. 

We have plenty of homes in my area that lists the original square footage from over 100 years ago.

I wouldn't shy away from California just because of tenant laws, as there are plenty of people here on this site making great money with rentals in this state.

I do understand Baltimore has plenty of D or even F neighborhoods.

@Derek Carroll the under $1m range is exactly the space that I'm looking into :) When you say there are deals to be had in this range (for lawyers, small medical, etc), does that usually mean buying a property and fixing it up to suit the needs of the business, or do you mean there are plenty of deals that are already turnkey for under $1m?