We relocated 8 years ago and I wished we hadn't bought straight away but rented. Local knowledge of an area and the things you learn from Mums in the playground about problem areas are all very helpful.
We moved into catchment for an outstanding primary, Ds1 was only 16 months at the time. Although a lovely estate there were problems with kids just sitting around on pavements drinking, being loud etc We would have known about this if we had rented.
Plus even though we went for lots of weekends to view houses we didn't realise how bad the parking was and you literally had to slalom around the parked cars.
So 2 years ago once both my children were in the outstanding primary and the housing market calmed down we moved 
Kids are very understanding about circumstances. Our original house from 8 years ago took slightly longer to complete on so Dh was already working in the new area whilst I was single parenting in our original house.
For the recent house move, we sold, moved into a hotel room for 3 weeks with me, Dh, two boys aged 7 and 4 all because we couldn't get our completion dates to match
My Mum also died just before we moved, her funeral was 3 days before we moved into the hotel.
But, it was worth it to get a house in an area we had researched, knew people who lived nearby and had local knowledge of the best streets to live on.
Good luck with your move.