I was literally calling and emailing people that I knew had section 8 vouchers that said they weren't interested because it's too cold to move.

You also have leverage over the tenant because if they don't pay their tenant portion and are evicted, they can lose their voucher. 

Last September, we agreed to rent to a DHA voucher recipient. 

You have a sec 8 tenant with a 1 bedroom voucher with housing paying $1000 per month?

That there is more inventory than there are vouchers currently available.

In Mass if the tenant looses their voucher the state turns their back on the landlord.  

@Parmer Cherry Section 8 (it's actually now called the Housing Choice Voucher Program) is just a program that subsidizes low-income tenants' rent. 

C/D areas seem good for cash flow but in reality evictions, limits on housing authority vouchers, and a more unstable tenant pool means the returns are almost never as good as they look on paper, unless you're a very experienced investor working in your own market (saving money on management fees).

Size of unit (small or large 3 BR), condition of unit and upgrades in unit will make a big difference in what CHA approves the units for AND tenant demand for your unit, they can easily take their voucher elsewhere-$4500-$5000 per unit is a good "plug" number for expenses in this area.

I also would like to explore accepting section 8 vouchers; but it is illegal to charge more for them.