If you don't care about income and are more of a capital gain kind of guy, prices are already high (as you noticed) and there's plenty of land available to buy so I'm not sure how much is left in the tank.

Lost Income- normally 18 to 24 months. 

The rates are high right now but these loans are limited based on cashflow so you cant take a loan that costs more than you're receiving in rental income.

FHA now allows us to count rental income from an ADU (additional dwelling unit) to help borrowers qualify.

Your ad should require "proof of income" not proof of employment.

The income of a property manager is dependent on whether you property is filled with tenants as well. 

I don't know your living situation but if your paying x,xxx for rent or a mortgage and instead by living in one side and renting out the other you will be paying y,yyy instead and y is less then x that's great, especially if you can rent out your primary residence and make income there too. 

Quote from @Polat Caglayan: How much do I need to invest for a house and a thousand dollar income?

Sometimes, there is also a tenant already in place which means you can start generating rental income from day one.

The problem is, that's not proper accounting because a credit card is a liability, and doing this workaround will reduce your assets rather than increase your liabilities, which totally messes up your balance sheet and debt-to-income ratios.