Move Every 2-3 Years and Rent Out Last Home

[David Ko]

Hello,

I'm interested to hear if anyone has moved every 2 or 3 years and kept their last home.  I am in Washington DC proper where homes are very expensive.  We are looking at condos in the mid $600k range (10% down) and hope to move every 2 or 3 years while keeping the old place to rent out and buying another.  Has anyone here had experience in that?  If so, how did you get financing without using future rental income as a qualifier?  Did you have to refi your old place into a commercial mortgage?  These would not be candidates for renovation.  Any insight would be great.  Thanks!

David