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.

But it does happen. the major risk is to the person you bought the home from. its their credit at risk.and of course if you put any down payment that would be at risk as well if things got bad.when you go into these deals you need to know if the bank does call the note that you can refinance and pay it all off or you have the cash to retire the loan.. anything short of that and your at risk .

I'm a corporate employee and it's time to transition so that I can retire from W2.  

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.  

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.