I personally have done this and would not recommend others do it. Things change, plans change, jobs change, marriages dissolve, etc... between buying the land today, and building the "future home" in the future. Also, land often does not move very well so if you do change your plans, it might be hard to sell unless you got a screaming deal. Your only buyer pool will be other people with enough financial wherewithal to buy land and build a house on it.