I'm guessing you live in california based on your screen name, first I would say ditch the .22 caliber rifle and get a AR-15 chambered in 5.56 or a 7.62x39 (AK). I say that because of the school shootings that has happened, california will try to be the first ones to really crack down on high power rifles. Cali has already cracked dowb on rifles, but they might take it a step further. Then you can pick up a .22 rifle.
You should really should not go too cheap on your firearms, you can't put a price tag on your life.
Check out the Mossberg 500 Persuader, it's 8 shots (7+1) and is good for those tight corners in your home.
I have Mossberg 500 tactical for home defense 8 rounds and dependable