The exact consequences may vary depending on the lender and the specific terms of your loans.

Through diligent research, I successfully secured a favorable private loan and became eligible for a home loan.

Based on that I'd recommend: buying an SFR with as little money down possible (3.5% FHA or low conventional) using the remainder of the money to build a JADU and an ADU (specialized ADU lender for the remaining amount needed to build the units).

The more you show them you know what your doing as a seasoned investor, the better the relationship with your lender will be and what they're willing to do when working with you.  

Lenders will allow up to 75% of the purchase price as long as the property can debt service. 

Does anybody know if my father can prove his income to a lender when I try applying for an FHA loan instead of my income? 

Rents greater than the PITI payment and if you can focus on 2-4 units the multiple doors help achieve that goal.On another note keep in mind Mobile/manufactured can be tough to refinance some lenders do not fund on them.

Partner with a local lender.

So in the end, I will be putting 4 new mobile/modular homes on these lots.Exit Strategy: Rent long term or Lease option to buy.The price of the "Farmhouse" is $175kRepairs: Pressure wash the house, paint inside and out, replace flooring: $10k$15k for fees, inspection, or any other unforeseen expenses$20k for Mobile/Modular Home SetupThe price on the 3 acres behind the farmhouse is $80kRepairs: Paint and new flooring $10k$15k for fees, inspection, or any other unforeseen expenses$20k for Mobile/Modular Home SetupTotal: $645kI have a lender who is willing to cover the deal @75% of the cost.I have a Gator who will cover the EMD.What I need is someone to help me with the Gap between that.

I am on this platform 4 or 5 days and already have calls booked with lenders and RE Brokers.