I understand the list is extensive, so please feel free to answer any that you can based on your experiences and insights:1.

Also, focus on 2 years of job/income stability.Class D Properties:Cashflow vs Appreciation: Typically, all cashflow with little, maybe even negative, relative rent & value appreciationVacancy Est: 20%+ should be used to cover nonpayment, evictions & damages.Tenant Pool: majority will have FICO scores under 560, little to no good tradelines, lots of collections & chargeoffs, recent evictions.

I only consider a cosigner/guarantor is that person is "collectible".

The state doesn’t have rent control laws, but landlords are prohibited from collecting more than one month’s rent for security deposits.

Locally, I know an investor that runs a crazy profitable trailer park where he is probably pulling in a 20%+ annual return on his investment - but he has to self-manage because no one will touch it, collects rent and deals with evictions armed, and has several "overseers" living for free on site to make sure no one burns the park down.

Also, focus on 2 years of job/income stability.Class D Properties:Cashflow vs Appreciation: Typically, all cashflow with little, maybe even negative, relative rent & value appreciationVacancy Est: 20%+ should be used to cover nonpayment, evictions & damages.Tenant Pool: majority will have FICO scores under 560 (almost 30% probability of default), little to no good tradelines, lots of collections & chargeoffs, recent evictions.

We use Stayfi to collect guest emails and it connects to Constant Contact which we then email them coupons and promos. 

Also, focus on 2 years of job/income stability.Class D Properties:Cashflow vs Appreciation: Typically, all cashflow with little, maybe even negative, relative rent & value appreciationVacancy Est: 20%+ should be used to cover nonpayment, evictions & damages.Tenant Pool: majority will have FICO scores under 560 (almost 30% probability of default), little to no good tradelines, lots of collections & chargeoffs, recent evictions.

This is basically you paying into a bond that will pay damage and lost rents if you are unable to the landlord but this isn't a collective of money pooled together for the common good. 

Unless you have extensive time and experience managing Section 8 rentals, it is not advisable to self-manage them.Did they send you pictures of the holes in the floor?