Anybody with experience buying or leasing mobile office trailers or shipping containers that have been converted to modular offices?  

@Aaron Mills (sorry it won't tag on my mobile)Getting your money back on a refinance would mean that you would at least get your original money back (70%), meaning the property still has equity when sold or cash flow after the refinance.

Is this a good strategy and are mobile homes very marketable for renting to tenants?

Maybe you will have to start with mobile homes.

For anyone that hasn't heard of him, he's the man.Anyways, purchased a 4/1 mobile home in a park for 5k.

The holes for the old stuff may not be big enough for PEX but that should be easy to figure out.I just redid a mobile with PEX and it went quite smoothly after we got the hang of it.

I sent out 1000 cards and got 4 hits, 3 of which were mobile homes. 

Ultimately, I would like to maintain a real estate holdings company with multi-family units and self storage facilities (as well as possibly a mobile home park or two).  

Would you buy a mobile home on a permanent foundation that has been modified (added onto) to the point that it looks like a normal house on the outside, but has a lower ceiling in the "mobile" section of the house?  

I know it stings the wallet a bit, but if it were me I would wait and choose my own tenant, especially since you are living in the building.They may fill the unit on their own- sales don't always proceed, and aren't always on schedule.