It works like this: pick one of their turnkey-ish houses from their list, or bring your own, get financed for a 50k house with 10k down, pay interest only @ 10% for two(or3) years with 5% accrued interest tacked on to the balloon payment after 5 years with possible 2 year extension.

Your low down payment loans will go a lot further that way!

Consider the cost of the property, mortgage payments, property taxes, insurance, maintenance, and property management fees (if applicable).

If you are replacing a rent payment with this then 100% yes bc you will come out ahead.

If you set it up with a car rental service like Turo are likely protecting yourself/car more from potential issues and damage and may be able to keep it off platform and only make it available to your renters (not sure on that last part but just a thought).Also, from a lender perspective it could complicate things if you are looking to refinance one day and have car payments included in the lease payments/on the lease.

Find out how much down payment you want to put in to the project.1. 

If they use hard money lenders those loans are EXPENSIVE loans because they are short term loans with no early payment penalties and they will also finance rehabs.

I have been updating the house and making the mortgage payments in the seller's name (kept his mortgage). 

I don’t have the down payment yet but I’m sure my relative will want the lump sum at some point.

I don't even have a payment system or anything in place.