My question is: when wholesaling, after finding a great deal, do you need real proof of funds to the get the property under contact or is there a way to get it under contract, find a buyer and complete a double closing/assign the right to sell without actually having the cash for the property? 

Really expedites the time it takes to reach FI when you can completely eliminate your housing payment and get into multis for such little down and start building equity/cash flow with each one.

I own a home improvement company and also completed a flip with great ROI.

Since its a portal for the tenant, both you and the tenant see a complete accounting of all payments made.

Additionally, the study must be completed by “qualified individuals” and “professional firms” that are competent in construction, design, auditing and estimation procedures for building construction.So while a specific methodology isn’t required by the IRS, taxpayers must ensure that their depreciation deductions and classifications of property are substantiated with supporting evidence.

Treat the stabilization of the property as the start of the seasoning period which is when the construction is completed and property is leased.

Or should I try to keep them completely separate to not dilute the brand of either?  

Hitting these targets could be the key to unlocking lasting investment returns.Before diving in, developers need to complete pre-submittal steps, including issuing a "Notice of Intent."

Could/would Mom be willing to add you to title and you both sign for a mortgage, once renovations complete?

If you could buy 15 houses a day, I’d be happy to write 15 offers a day.Your entire post is still completely irrelevant to the original question.