I think one of the methods of owner financing you are referring to is known in some parts of the US as Bond for Deed or Contract for Deed.
I believe these work like Rent to Buy as the title only transfers after the last payment is made.
However, if the 'buyer' misses more than an agreed number of payments they are turfed out with no build-up of equity.
Appeals to bad credit, desperate, types of buyers with little hope of any other way of owning their own home and is hence a magnet for 'sharp operator' type sellers as they can 'sell' the same house many times over in theory.
The benefit for the 'seller' is they may ask for a lump sum as down payment and then get a monthly payment equivalent to rent. I think the lower the down payment, the higher the monthly asked.
They also don't have to pay property taxes or maintenance for the duration as they are not classed as landlords. I think the property tax part is also paid monthly on top of the 'mortgage'.
I first heard about this back in the 1990's so it could be more regulated now. I hope so!