If so, your conforming residential loans are on the table..

Otherwise, its not the end of the world to just declare the money and the investor is effectively gifting you the funds for the down payment.You could/should be able "get around" this with a commercial loan since they don't have to follow the regulations/stipulations of a conforming loan to my understanding.Good luck.

The property was an out of business car dealership, which contained a small 90 sq foot office, in addition to a legally non-conforming 2bd house.

For a conforming loan, they will need two bank statements, hence the 60+ days, showing that the funds are there and you don't have any other large/unexplained deposits withdrawals.Depending your arrangement with your investor, you might create a bank account under your name but include the investor as a signatory. 

Either way, you'll need commercial lending because you are looking at commercial properties and because you are using a legal entity (which are not eligible for conforming residential loans). 

If you don't have one, find one...An asset based loan, to my knowledge, isn't a conforming residential loan so there isn't a fixed set of requirements. 

Conforming residential loans that "everybody else" wants is only good with "decent" properties and generally require owner-occupation. 

I need a none conforming loan in order to buy out private loan and partners equity, the reason why is because the mobile home pre-date the Fannie Mae loan requirements set in 1976.

@Conor OlstadYou just may need to go after non-conforming loans. 

The issue is that a legal entity is not eligible for conforming residential financing.