Moving is ALWAYS a major hassle...unless you are just renting, with minimal household belongings. When we bought this place, the contractor had just started building, and we put our city house on the market...expecting the sale to take several weeks. Boom!...a week later, we had a firm offer for just about what we were asking, and the new owner wanted the house in 30 days. We had to go into scramble mode, and quickly move everything into storage, and we stayed in a local motel for a month while this house got finished.
If you can afford to do so, buy this house, move your stuff, then put your old place on the market, and take whatever you can get for it.