So the lower the interest rate on the subject to loan, and the higher the prevailing rate, the more chance that a lender will initiate action.   

Make sure you talk to a Banker or Loan officer that is well versed in both SE (Self Employed) income and also Non/QM programs.One tip I will give you as a Banker is open up a "Business Checking account" and for the next 12 months pay "Everything" out of that account. 

Been looking at hard money loans, and also looking at doing a 401K loan from my w-2 job. 

"A second question is if I finance the car purchase can I also deduct the business use portion of the interest charged on the loan?"

When Trying to qualify for a traditional loan, lenders usually price your purchasing power at 3x your net income.

Hey Jack, There are two types of loans investors use in their BRRRR strategy. 1.

They simply do Fannie, Freddie, FHA, VA, and USDA loans.

Is it possible to keep my land loan out of it to keep the total cost low?

Doing an unsecured loan is a horrible idea. 

More on DSCR loans: DSCR loans won't use your income to underwrite the loan.