For instance, after 7 payment.

There is typically no "splitting" of the debt and income as you suggest, except in defined instances such as when you are an owner-occupant of a multi-family property such as a 4-plex.The NCF is computed most readily by going to the tax return from the prior year, start with the bottom line for the property, then add back depreciation, interest, taxes, and insurance.

Is there a way to add loans, for instance if there is a seller carry-back or 2nd note with a different interest rate for down payment?

I only use my license in buying/selling for our company related projects (except in rare instances when someone I know is looking for property, or wants to sell) All of our projects are done under my General Contractor's license, but I don't work on jobs - though I do go out to jobs regularly, and am involved in all aspects of the project.

In no instance will more than one (1) pet be allowed.

For instance, one party may have the cash but no time, the other less cash but time and expertise in finding and managing deals.

Not all states have the same rules on these, for instance not all states recognize single owner LLC's.

It's fun to drive on the same track as world famous drivers.

However, in this instance, that is not the case.

In three of the four instances, I had the system installed at my expense, for the tenant's use.