The background check is supposed to identify the amount of risk, then you determine whether you can mitigate that risk or not.

If there's enough duplexes that it's likely you find one you like in a reasonable amount of time (less than a year), then start looking at them in your preferred area.

They then refused to accept responsibility for it.

If the land you are looking at, has a conducive future zoning to your needs, then it is easier.5. 

Then you can read a more in-depth book like The Book On Rental Property Investing by Brandon Turner or The Unofficial Guide to Real Estate Investing by Spencer Strauss.2.

typically with seller finance there would be some period of monthly payments and then a balloon where you pay off the balance in full. 

Oh heck yeah they exist. people who could do a lot more then there funding allows, oh-yeah those people exist. 

To evict a tenant based on a lease violation such as hoarding would require you to notify them and then give them an opportunity to fix the situation.

If so, then there can more flexibility there. 

I was specifically interested in his 2nd plan which was "Building wealth through single-family homes" where he basically says you save enough to buy your first property along with enough for other fees and then you just keep saving the money you make from that property along with some money you save from your job and once you have enough money you buy your next property and then you basically just keep repeating that until you have your desired amount of properties.