If someone pairs this with a VA or FHA loan product they can play this game with low or no money down. 

DSCR loan options will qualify you based on the market rent for the property - this can be helpful if you can support projected rent above the mortgage payment.

If so, what type of loan is used?

Even though the manufactured house is pretty much completely updated... the manufactured house was made before 1976 so no buyer can get a loan.

A few questions that may help everyone in the forum offer more targeted advice:What is the 67k "non-mortgage debt" is it from a credit card or student loans, what is the interest?

However, the bank indicated they cannot finance the 6-unit property and I would need a commercial loan for it.

It's ideal that you own the property outright because the holding costs on a hard money loan a lot of time is what kills development deals. 

Buying under an LLC shifts the type of loans you would be eligible for, and likely rules you out of considering a house hack or using an FHA/VA loan, but opens up different funding options if you have the capital for a larger down payment.

Using the fix and rent loans and 100 percent renovations how much does such a loan costs?

It's the same work to do a $50K loan as a $500K loan so the fees will be higher due to the loan amount but will still be much lower than what a lender or broker gets paid on a higher loan amount.