I agree with not using a realtor. A For Sale Buy Owner is a real deal and the paperwork can be handled through a Title Company for pennies on the dollar. Ive bought three homes now in the last 11 yrs all brand new. Ive made money on all of them. So I cant complain about new homes.
My theory is that if it looks cheap, its built cheap. I.E. white conter tops, brass fittings/faucets and cheap lighting are dead give aways. However, if you can find a cheaper house with a great location and plan to change those things yourself fo nicer then you will make money also.
Also pay an inspector with many years of experience. They may miss a couple of things but they generally find the important stuff.
Stay away from Tri-Level homes, I believe they are the hardest to sell.
Oh and get a pre approval amount, cut that amount in half and look for houses in that range. You will be happier in the end with more money in your pocket. And dont give on the things you want such as room to build a garage, etc. Just keep looking.