To Rent Or Buy...That Is The Question

So for the past 4 years now Rich and I have agreed when we leave Maryland we will buy a house. We were tired of renting and throwing away money. We just couldn't afford to buy a house here in MD. Well, we finally get orders to a place we can afford to buy a house. I am all excited about buying and Rich wants to rent. He is afraid we won't be able to sell the house in 3-5 years when we get orders out of Florida. Well who knows what will happen in 3-5 years? Even if the market was amazing right now for sellers you don't know how it will be in 3-5 years. Are we always going to live our life based on "what if?" So we are having a hard time agreeing on this issue which wouldn't be such a problem if we didn't have less than a month until we move. GRRR!