In any contract you don't typically need a clause saying what you CAN do, its assumed you can do anything legally allowed as an owner including sell.

typically with seller finance there would be some period of monthly payments and then a balloon where you pay off the balance in full. 

I have to think this is not his software but a white-label offering.

It does share similarities with annuities, but the structure is designed for a specific audience:Property Owners: Typically those who already own income-producing properties but need liquidity for renovations, debt repayment, or other opportunities.Investors: People seeking exposure to real estate cash flow without the complexities of direct ownership, especially those already familiar with stocks or REITs.Again, the idea of the model isn’t for everyone.

These loans are short-term as you mentioned, typically 12 months, so you'll need to refinance before that balloon comes due.

Perhaps do a case study with a hypothetical deal you think is typical for what you are looking at and compare it to the alternative investments you might use and their expected returns.

The IRS generally does not allow you to deduct expenses for a property that has not been placed into service, as deductions typically apply to operational properties actively being used to produce income.

Typically, we see anywhere from $600 to over $1000 per unit (maintenance and turn costs)  depending on these factors. 

While the guarantee of income sounds great, it's only a percentage of the rent, typically up to 70% and the tenant has to pay the remainder.

The way to get access is typically reaching out to the sponsor and getting the PPM and the documents you need to do a thorough review.