3) Your $250k with 30% down => about $750k (you also need funds for closing costs, taxes, etc.)

I do like the tax benefits and leverage.

Also I would buy tax deed land for say 2k sell it a few months later for 10k on terms that was my cash flow. 

so I used 1.5% as a property tax number, and I used $200 mo for insurance.

As someone mentioned, the only thing passive about real estate investing is the tax treatment. 

Your problem will be them incurring capital gains taxes simply so you can get a commission.

High taxes.

I agree with the others here that say you need to have some skin in the game, if you are going to live there yourself, get an FHA loan rather than owner financing, you can get a 3.5% down loan, personally I do not love these as they require  PMI which is an additional expense, and you also need  bring additional funds for closing at least for taxes, title, attorney and transfer fees . borrowing from anyone else for the down payment, to include a personal loan from the bank is not a good idea, those again will be higher int. rate.

@Daniel Tanasa $1905 per month (mortgage +interest) , taxes (around 3600 per year) and insurance (1500 per year) => so 2330$ is my PITI

While we don’t have state income tax here we do have the hurricane tax that comes with high insurance premiums and little real insurance benefits/help when it’s needed.