Can any one recommend a good title company, that preferably preforms double closings if possible in the state of Ohio?

Overall this change will almost double the amount I can save. 

Has anyone tried to/had success with assigning/double closing a wholesale deal to Opendoor?

The terribly underestimate the rehab cost and severely overestimate the ARV, and most frequently miss associated costs such as double closing, financing fees, escrow costs etc.

:1)Find an investor who would double as a source of money for down payment and a cosigner2)Use an FHA loan (3.5% down if I live in a unit) to buy a quad-plex3)Use the 203k aspect of the loan to improve the quad-plex and force appreciation in the property4)Refinance in a year or two to a regular loan and pull equity out to either pay off my outside investor or use equity for another down payment on another quad-plex5)Repeat With this plan, I believe I will be able to cash flow from day one because I will be able to rent out three units to college students around campus who are willing to pay higher rents than most.

In my market, a multi-family will sell for less than a SFR of the same square footage, because multis are bought as investments and SFRs are bought as primary risidences, so I would double check that you are actually adding value by converting.

Unless you can provide your private lender with secured double digit returns, I agree with most, your dad may have to do this on his own, or simply have you intern with him on this deal. 

I have a background in the construction industry and have watched others do it but never felt comfortable putting my family in financial jeopardy by taking the risk.

I double-dog dare ya!

Use the bp calculator to double check.