Buying a Second House

With the housing market crashing down and looking like it has bottomed out. Me and my wife have been thinking about maybe trying to buy a second house. No, we're not trying to bloat about it, but we came to a conclusion that we need a bigger house. Our current house is about 1600 square feet, 3 rooms and 1 bathroom. We have 6 dogs, 4 cats and a brand new baby, as you can tell it's a little cramped in here. We have been keeping an eye on the house prices here in Jacksonville and have seen some houses that are 2800 square feet selling for under $100,000.00! We bought ours for $150,000.00 darnit!! Our plan is to try to buy a bigger home and then rent out our current house until the economy gets better then sell it. I don't know how many of you out there have thought about this or have even done this, but I wanted to know what your thoughts were on this as I'm sure many people are thinking the same way, with low home prices and low interest rates.