I bought a house last month in Texas using a 30-year fixed loan.
We did use a RE agent, though I'm not convinced they are worth the ~6% they get on the transaction (3% for seller, 3% for buyer), especially on the buying side.
We put 20% down and then payed down to get to a ~5% rate. This was a gamble, but it looks like it'll pay off over the next five-ish years as the rate we would have gotten otherwise would have been substantially higher (as rates go). It was previously a rental home, so not in great shape - but not what I would call a "fixer-upper".
Sometimes you just need to decide whether the home, layout, neighborhood, school district, loan, etc is worth it and, if so, go for it. Assuming you are being responsible to your obligations (kids, for example), live your life the way you want to live it.