I only moved in 4 weeks before the wedding - does that count?
We'd met while I was still at Uni, so lived 3 hours apart. He came to visit most weekends (and we often shared my single bed in student accom for the weekend). When I started working, I got a job in the city where he was working, but on the outskirts (he was other side of city centre) so got a room in a shared house there.
We bought our house, on the outskirts a different direction, which was finished as a shell in Sept, we had a lot of painting, tiling, carpeting etc to do. DH moved in to save on rent, he had a car to drive in and out. I was staying in DGran's at that stage, which was rent free (and company for her). So I was there a lot, and stayed over a fair bit at weekends, but midweek it was awkward enough. So I only moved out there over Christmas when it was mostly habitable (DH had been sleeping on a camp bed until early December).
There was a slight religious/family aspect to it (I did have one aunt who "couldn't go down to her parents in case they might ask about it" trying to make me move back to my other DGran's house, 2 weeks before the wedding!). But it was mostly a practicality issue.
1 DC (what we are happy with) later, we are celebrating our 15th Anniversary today!! And we are pretty happy most of the time.