So this seems to be a go. How it's shaking out, different from @Brandon Turner 's video and my newly acquired numbers.
The difference between lowering the rent a bit and having the students (or tenants) pay the utility bill will be huge. And that's because i'm in the NorthEast. $$$$ oil/gas and electric highest in country.
The difference between the number of bedroom and adding one more is huge. Once you hit all your overhead and mortgage, that next room is basically all profit.
Ask the owner to hold the note if you have some credit issues. Pays off. I will re-fi in a year. So that 8% will hopefully be a 5% and the numbers get better.
Property has septic and wells, so no water bills. Trash only 400 a year. And I overestimated for electric but that's fine.
The lawyer has been very helpful in sorting out the kinks both with town and with eccentric owner, who was insisting a friend of friend stay in one of structures past the time the students return. 3 months after the closing.