can i use SEC 8 rents as a basis?

tomorrow i am looking at several quadplexes (2/1) priced around 75-80k each

I am looking at huds site and they pay 763 for 2 bedrooms in our area so i am looking at around 3k in income each month.

Is it safe to assume i should get at least the 763 in rent since SEC 8 rents are lower than average?