One problem that took me YEARS to learn was that a fixed up building in a bad/undesirable area of town is just not worth very much. 

What type of things makes a FSBO undesireable to work with?

I've been searching for information on this topic (hence me finding and commenting) because I'm considering this with a house I own that apparently has some "undesirable neighbors" that make the property a lot less desirable to most tenants.

Our purchase contracts always contain a clause where we deduct 2-mths rent from the purchase price for any units that become vacant prior to Close ... the purpose of this is to keep the vender motivated to keep the building full.To avoid receiving several units of undesirable tenants, we also insist that all new tenants be subject to our application and screening process ... we even offer to assist the vender in securing new tenants.

Stucco for my area is a very undesirable trait but I'll still buy them for the right price.

Where do you do this a ) high traffic zone in a there are less distressed home owners b) A mid - high traffic zone in an undesirable area - less properties qualify for loanc) Less populated area where no other bandit signs / little marketing exists d) none of the abovee) try them all and take score?

The difference between violations to the Airbnb review guidelines and constructive feedbackWhile this is an undesirable avenue it does occur and we are glad there are rules and guidelines in place to follow.

Right not you have a sub-par unit, in an undesirable neighborhood within it's market, that doesn't cash-flow, and doesn't appreciate.FYI-When I say "Ghetto" I mean within its market.  

If that doesn't work, take a dose of @Rob K 's advice and mix it with a dose of @Ryan Richard 's advice - let an undesirable occupant move in for a few days.

The area is undesirable to some due to the schools, crime rate, average incomes, and racial makeup.