I literally think of loan sharks or getting your house or assets taken away from you when I hear it LOL. 

One is the loan-that was borrowed money, return it. 

As a private lender would you pay the full 100%, or still do 75% Loan to Purchase price and have borrower put money in?

@Jake Posner- thanks for the post ...if you plan on needing financing for the rental proeprty - make sure to get  fully pre approved  for the hypotehtical  scenario you are planning ...use a loan officer or lender that is licensed is all the states  you are looking at . thanks 

I even got an email from a private lender offering a loan AND the collateral due to the borrower burning through capital and now they are stuck with it. 

I also have a primary residence with nearly a JUMBO loan at a high interest rate and I own a vacation place in cash (small trailer not worth much money but i also own the land) in a different state that I pay RE taxes on. 

If I’m going to use a combination of hard money and conventional (maybe FHA) loans, I will need a LLC for hard money eligibility anyways.

They can and often will say 'no' but if you can just get a 'yes' on a single digit fixed rate you're probably better off than any personal or consolidation loan you may get.

As to the second one, they and others (not that long ago) used to advertise fixed-rate loans at 2.4% and 3.6% interest rates.

Most banks have restrictions and a Clause where the mortgage/loan becomes "Due on Sale".The biggest benefit of going from personal to LLC is to protect your assets against a law suit due to an injury or death by someone renting or using the property.