Primary residence -> future investment?

[Erik E.]

Hey everyone.  I wanted to see if anyone purchases their primary residence only after running the numbers to see if it would be a profitable rental once you move out (I know the numbers would most likely change so maybe you can't truly tell) or do you buy a primary residence and just see if it would work as a rental when you're ready to move out.  In short, should you make a purchase based on gaining another rental property, or should you buy what you personally want in a home and then be pleasantly surprised if it ends up being a good rental later on and if it isn't just sell it?