Eddie - when we moved up to Scotland from Essex, we had to rent for six months, because that was the best way to get a house in the area we wanted to live in, without having to be rushed into a decision about buying a house.
It also meant that we were able to take the time to decorate the new house before we moved in, which was much easier than doing it when all the furniture etc was in place - though that will not be relevant to you as you are buying new, and presumably the house will be decorated when you move in.
It was a pretty hellish thing to do - I hate unpacking after a move - I look at all the boxes, and I know that opening them means I will have to find somewhere to put all the things within - whereas if I don't open them, all I have to do is find somewhere to put the box! Mad, I know. Luckily dh is good at opening boxes and emptying them - and then I have to get on with finding homes for all the stuff.
What we found helped was that, although we rented unfurnished, so some of our furniture had to come to the house, we kept to a minimum the possessions we unpacked - the house we rented had a garage, and we stacked boxes and some furniture in there, so there was less to repack when we moved a second time. I would definitely recommend doing this, even though it meant I had to survive 6 months with a small fraction of my books, as most of them were in the garage!