DP and I are 37 and 36, FTBs. We're currently renting and have saved a decent deposit. We've got a decision in principle on my income only - DP has a blip on his file - which is enough to buy a nice 2 bed flat or an ok 3 bed house. We're both financially stable, apart from the past issue on DP's file, and have no children (although are TTC at the moment too!).
I was really keen to buy somewhere we could build a family home in (good schools, 3 bed, decent garden, etc) but I'm starting to wonder if we should buy somewhere that's nice "for now" but look to move again within 5 yrs. The short term option would be quicker, easier, we could get on the ladder, overpay the mortgage, build some equity, etc. But then I think of the cost/stress of moving and I'm not so sure. The family house is obviously for a family, but we could be TTC for years and planning for something that may never even happen, instead of actually living in the present and making the most of what we have. On the other hand, if I get pregnant quickly, that puts pressure on us to buy quickly before the amount I can borrow is affected. 
I'm feeling quite overwhelmed and it feels like we're going round in circles and not getting anywhere. Help, WWYD?