are you in apts or a house?
there can be a big difference in what you need also because of that. Mossberg 500's are great guns, we used em on our ship. easy to tear apart and maintain and it has a saftey as mentioned above if that is a concern. i also agree if your a newb the shotgun is the way to go. no need for aiming just "spray and pray" lol
try a pawn shop too, there are usually some pretty good deals there as well. you can usually find good prices on lightly used guns. once you get comfortable with em then spend the money on your preferred "piece". goodluck with the search...
townhouse. own the basement to the roof.