I'm not counting those since I don't manage them, but I typically avoid cities and states with laws antagonistic to landlords.

For example, if the typical rent per unit is $1,500 (3bd 2ba), my landlord at the time would have one unit with three rooms and four people within the unit (one person per room and one room with two people), each paying around $500.

You can use a tool like AirDNA to get estimates of property performance in your specific market and with your typical size and configuration of home.

These platforms typically have billing policies where you pay a per unit fee per month to the software and you get regular updates and support each month.There are a number of low-cost platforms available that are able to offer you a lower price by passing along some of the costs to your tenants (payment processing fees, applications, tenant screening, etc).

The "typical" off market seller is someone who thinks their house is in too rough of condition to sell on-market, but doesn't have the money to fix it themselves.  

Typically people who ask this question either a) have TONS of money and no time and can afford to take losses and risks OR 2) are pretty naïve to all the risk of long-distance OOS investing.

Quote from @Ogonna Odo:  Small ones will not, they typically like cash or checks.

Typically it would be the tenants responsibility to provide access.

You're better off opting for an interest-only mortgage, saving on payments, and then refinancing it into something more conventional when interest rates drop—or, if possible, making a plan to pay down the principal.Interest-only loans, which typically last for the first 5 to 10 years of the loan term, offer two key benefits.

"-  Section 8 rentals typically follow a purchase and rehab project.