Lots of risk that you can't control and it is taxed as Ordinary Income plus the IRS will see you as self employed so you will pay all of the Social Security tax and perhaps a 2.5% extra tax if you make over $250k. 

How can I increase income from this property? 

I've heard you can designate a family member as an employee and avoid taxes if you keep their income under a certain limit.

Sales price: $900,000Seller finance: $400,000 / 2 year ballon / 7% interest rate / interest only monthly payment: $2,333 / no pre-payment feeEstimated monthly income: $9,300 / Annual: $111,600Electric separated - water $450 per monthProperty taxes: $16,700 (with property value assessed)Property Insurance: $6,300Renovation Repairs $150,000I anticipate the Re-fi appraisal to come in at a conservative $1,150,000. 

Your incomes will be combined when you qualify for the loan, and both your names will be on the deed as “tenants in common.”

You'll pay ordinary income tax.  

They increased my annual by $500.  

Are you talking about what would be deemed as income to determine if benefits are taxable?

If you are looking to buy as an investment property, perhaps it's not a bad idea.If you are looking to buy a new primary with low down payment, in order to circumvent the DTI issue, you need to provide your lender with a lease and two months' rent for your departing residence at closing, so that the debt-to-income ratio is not an issue with your first home being counted against you when buying your second primary residence home. 

Mitsubishi Estate has purchased a lot of real estate for the intake of new foreigners that will start to receive a Digital Nomad VISA for Japan. https://visaguide.world/news/japan-plans-to-construct-10000-...If this opens up the amount of time foreigners with proof of income can come and visit, even if it's a year, I will re-open up this as an option.