let's say i listed a three bedroom rental for $2800 but the the tenant8 applicant has a gross rent voucher for $3200.

I am seeking advice on how to proceed with a prospective tenant who has a section 8 voucher.

You cannot discriminate against the origin of the income and if there are vouchers involved income should make up the remainder of rent due not covered by the voucher.

@Michael Bishay your biggest challenge will be getting your expected ROI out of Class C & D properties.S8 vouchers aren't necessarily a guaranteed solution. 

I have not had Voucher tenants before, I am thinking about asking double deposit as they are not making employment and salary criteria.

Residents must settle overdue rent before moving.The Section 8 housing voucher waiting list is closed, with a wait time of three to five years, but Dosker Manor residents are being moved to the top of the list.LMHA has 2,800 apartments citywide, with 1,500 past due on rent, but no evictions for non-payment in four years.

You are exempt from the "source of income" protection though, which means you are allowed to deny an application just because they have a housing choice voucher, which would not be the case if you owned more than 4 units. 

Hey Team,
We currently have a Seattle Housing Authority (SHA) tenant. With their lease renewal coming up we'd like to include a flat rate for their Water Sewage and Garbage (WSG) portion of the utilities. Based on ou...

I'm talking about bringing it up to the standards of a Class C rental that section 8 would pass as a rental for its voucher holders.

I know the rent is going to be paid and if they do something wrong, they loose their voucher which is more valuable to them than it is to anyone.