Yes, you could do it. Papooshka is right, but I would say you could definitely rent a 3 bed condo for less than $5K. We do, and the rental market has been on a backslide for some time. But it does depend on where you live and how well you negotiate. We pay around $300 a month for utilities (and use air con all the time).
Local preschools can be cheaper than $1-2K, but you need to be comfortable with their different approach to what you will be used to. We are about to move DS and it will cost $1500 per month, but that is full time.
The big costs here are rent, international school and health insurance. If your DH can get comprehensive health insurance provided by his employer, that is a big saving. Cars are very expensive, but most people rely on the public transport and taxis. Taxis are relatively cheap and the public transport reliable and cheap.
When you say you'd like a little help around the house, a live-in foreign domestic helper's costs start at around $1000 per month (all costs, not just salary). A once-a-week cleaner costs around $60-80 for 4 hours (some people claim to have cheaper cleaners, but I've never found one). A babysitter will cost anything from $5-20 an hour (most around the $15 mark).
When you're doing your sums, bear in mind that you will want to travel in the region to take advantage of the location - so budget for holidays. You will probably also want to factor in a trip home (or two) or at least have the funds on hand to fly home if you want or need to.