It tells you how much interest you paid on your mortgages.

I have the rents coming in from Venmo go into one central account and then transfer them to the proper bank account corresponding to each rental.

The "zero-down, take-over-my-2.5%-mortgage" is a unicorn example that he likes to throw out there as bait for all newbies to buy into his program.  

Is your DSCR ratio greater than 1-meaning are you cash flowing (according to the lender's criteria of mortgage, property taxes and insurance (and HOA) if applicable).

Lenders often prioritize the person’s payment history hence it is imperative that you maintain proper financial records.Good luck!

Also, will she be able to qualify for a mortgage, if not, putting all of her money towards a house is not anything I would do.What sort of pension will she have?

Do people regularly invest in properties they can’t afford the mortgage of with full vacancy?

There are also many more passive investments which would pay more than your current return (>= 4.4%), like real estate funds, syndications, mortgage lending, even treasury bonds are paying more right now.

It's obviously better than owning without any offset to that mortgage payment. 

Soon closing on a property property cost $458k and the closing cost is really high we are doing FHA mortgage they are charging 2% of the loan plus application fee and mortgage insurance on closing for the amount of $7k and plus monthly mortgage insurance... in 2020 there was not just a thing 2% of the loan on mortgage origination loan fee!