You can buy a home with one income, no problem! We used a mortgage broker and he was able to find us the best possible mortgage when we had a small income. (This was in 2006.) Now that my husband has a new job we want to move, so we were able to call the same mortgage broker and update our info and he told us the loan amount we could be approved for in about five minutes. Then we had to make sure the monthly mortgage (including escrow and everything) fit into our budget.
Unfortunately for us we can't get another mortgage until we sell our house, and it's hard to sell a tiny house full of kids and pets. Very frustrating! We're hoping to move to the country too.