Once you have that income number in place you can then look at expenses and debt service on the property and determine if it makes any sense.

Hello BP, sometime ago i read "The definitive guide to using seller financing to buy real estate", and only thought that to prevent due on sale clause, that would mean i can only used this method on debt free property.

But my ultimate goal is to apply the buy and hold /"BRRRR"(buy,rehab,rent, refinance and repeat.)plan to Achieve my financial freedom .Well, taxes are an expense you take out BEFORE debt service; that is, it's part of the NOI (Net Operating Income) calculation.

For those who have a primary source of income that can support the debt, a loan might still be possible. 

Banks know there are investors out there so unless your debt-2-income, credit, over-leveraged (multiple mortgages perhaps barely making payments), then I don't see that the banking industry sees an issue.

I am a firefighter and started a second full-time job with purpose of increasing income so that I can buy more property, reduce current toxic debt(any debt that doesn't pay for itself) and paying off the 3 rentals that I currently have so that I can take and borrow on them again to buy more rentals.

It would also amend the Truth in Lending Act with respect to minimum standards for residential mortgage loans, to prohibit, in determining whether a residential mortgage loan is a qualified mortgage, from applying to loans originated by such a person certain guidelines and regulations relating to ratios of total monthly debt to monthly income.

One question I have is if we took that zero down financing option, the cash flow after paying the debt service is slightly negative. 

I am officially paying off the last of my collections this thursday, and then Ill be collections free, and I can be debt free in less than 6 months after.I really want to continue expanding my businesses, as well as expand into RE, with a more heavy emphasis on RE than my businesses until the previous and current acquisitions stabilize and the dust settles.I wont say how much I make, just that I have the cash flow to very easily put down 10 and 20% down payments on houses every two weeks with ease.I really want to expand into RE in the baltimore area, fort meade area, Joint base Andrews area, college areas across the US, in Tennessee, and in Texas. 

Two young professionals, with decent income, minor debt, and decent credit should have no problem qualifying for a 1-4 multiunit.