You're married, with a kid.

It's worth to re-evaluate the amount of risk you're willing to take, and lifestyle you're willing to sacrifice as it now involves your family.

Do you have sufficient cash? What if you can't rent out those apartments and you still need to pay maintainance fees?

What about the security of living in apartments, now that you have a family?
Is it better for your kid to grow up in an apartment area, or a housing estate that you're targeting.

When you move out one day, will you be able to re-finance your apartments to move into a place you call home i.e. a nicer building that the apartment you're planning to buy.
Or would you rather secure a decent roof right now first, and a place your family can enjoy a longer term home?

I think the concept of making money work for you is true and lucarative, but beware of the other side! I think those are a few items.
You're no longer single, window of opportunity is over.. hehe..