Well, there's different reasons for the different several times we've moved, but they've all been the same: money.
The house we were living in at the moment had $1,000 rent a month, but sadly, for a while there, my dad hadn't been receiving much work at his job (he's a truck driver and has to deliver and pick up medical equipment across the country, but for a few months, he hadn't had any cross-country trips), so his paychecks weren't as big as they should, therefore we weren't exactly able to come up with $1,000 a month for house payments. AT FIRST, the landlords said that was okay, and they'd be happy to work and bear with us until we could caught up and stuff; then around September, when my dad was able to catch up and pay over two month's worth of rent, they decided to turn right around and say "we don't want your business anymore, please get out tonight!"
That's how the situation turns out about 8 out of 10 times, and we've moved now nearly twice that many times! Dang, how do people do it? How do they manage to stay in one house all their lives?