benni--Your points are well taken with regard to your neighbors, but what's to keep people from selling their unit the next month, or renting it out? Are there any rules within various condos that you are aware of that prohibit people from renting out their units?? I know that there is at least one unit in the complex that you live in that rents out units, as I have seen the unit online.

Purchasing a condo has advantages in terms of exterior maintenance, etc., but problems with neighbors may be beyond your control.