We moved from a condo to a terracehouse some 4 mths ago. My kids are 4 and 6 yrs old. When looking for a new place I was in doubt what to do. Stay in a condo or move to a terrace house (as our budget isn't that genereous). Now, though the kids ask for the swimmingpool, the garden makes up the loss of it.
We used to live in a new 4+1 with about 2100sqf (which is large for newer condo's). Now our house is 5+1 on 3100sqf not including front and back garden.
Pro's of condo: social contact with other people/kids, facilities. Con's: unless you trust your maid, you always have to go down with them (or get a ground floor unit). Still when going to the swimmingpool you have to accompany them.
Terracehouse pro's: just open the door and let them play. We are fortunate to have a long paved driveway which allows them to cycle, while you still can do whether you want to do. More space. Con's: where we live no interaction with neighbours. You have to take care of garden, straycats, pestcontrol. Also have a lookout whether there are many dogs living in "your" street. Their owners leave them in the front garden every evening/night when they go to bed, so the whole street starts barking around 10pm, 3am (someone returning home from night shift), 6am (pick up of local schoolbus).
It matters a lot whether your kids are going to school or not. My kids have playdates almost every day. Usually when they are invited over to someone who has a pool, they will bring their gear. While we lived in the condo, we used it 3-4 times/week. By the way, we do not have a clubmembership either. I noticed that the kids who live in a condo, love to cycle and do ballgames. But I guess it depends on your condo. Our old one did not have the space, but I have been to others (mainly the older ones) which offer good grounds to cycle and play.
All in all, I do not regret moving to a house. What I noticed in the school is, that once you arrive and you only have 7-10 days to find a house, you fall for the facilities. But after two years, the majority with kids all moved to houses as the garden and more living space make up so much for the loss of the pool. Though some classmates managed to find houses with above the ground pools for the same rent as what I am paying now.
Good luck.