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.

I feel my largest use will be online rent collection as well as tenant screening.

That way, you're getting paid without having to interact directly with the tenants, screen them, collect rent, drama, etc.

We have extensive equity available (over 400K) and extensive savings to get the project moving.

Gross revenue is all income except taxes collected. 

The LLC would collect rental payments in a business account and make the monthly payments on the mortgage operating like it should.

As a general tip, work with PMs who have extensive experience with Section 8 so they can easily guide you.

Do you have collected any certified letters of tax notices sent by the local tax collector?

Should I be paying sales tax to sub contractors as owner builder, so use reseller certificate and then collect tax from ME.

It also depends on the extent of the foundation damage and repairs, I have done minimal slab crack repairs on flips and disclosed to buyers, without any issues, and I have also done more extensive slab repairs with plans, permits and inspections, and also disclosed to buyers, without any issues.