This question can be answered at the "macro" and "micro" levels.  

Where Costar shines is being able to look up data on off-market properties and also list commercial properties as well as getting reports on the macro market.

Downtown Miami stands to benefit tremendously in the next 5 years from the completion of the Miami World Center.Don't skip over Edgewater, its central location and new buildings have drawn a lot of clients looking for the Miami life but a bit less noisy. 

Between questionable long term water supply and a heated market cooling off and rents dropping at a macro level, it is hard to want to buy something, 

Generally if you look for properties in locations with stronger macro statistics you will see that rents and price points tend to diverge from each other.

Spend a few nights there and see if it's noisy neighbors?

What else macro-economic factors do these type of deals hinge on?

Still, nothing will completely stop a thief.As far as the bad, well that's just the same as any other roommate that you might have - don't get along, they're slobs, noisy, bring over sketchy people, etc.

It likely will go up over the long time, or net deflation happened in a macro sense or you bought a **** location.

So if you follow macro and micro-economic trends regularly as it is, it will only take about 30 seconds.