My family is relatively mobile at this time. 

Well I think for the most part the 50k to 60k properties are pretty dried up in Bakersfield unless you're buying in a very shady part of town, or a mobile home.

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).