The PP is around $72k but current value range is around $140k+ based on recent comps (not a lot in the area though). 

Secondly, DSCR loans offer favorable terms and lower risks, as they assess the property's ability to generate sufficient income to cover debt obligations.

Based on your scenario I dont see why you would not qualify to use FHA since it doesn't appear you already have an FHA loan so the self sufficiency doesn't apply amongst others.

Projects in this price range are our bread and butter -- custom builds, whole house remodels and additions. 

I can’t tell you the exact price per sf, but generally, I’d pay about 10-20k for just drywall, carpet, doors etc in an unfinished basement, if you have any minor  foundation issues/leak that’s probably another 5-10k adding a bathroom is probably in the 8-10k range maybe a little more if you have no drain stack in the basement, digging down can easily be 50-100k 

I usually offer $25 less per month for 2-yr than the 1-yr renewal option depending on rent range.

The longer drive to urban job centers outside of commuter range kept those places from getting too crazy in price because the lower local wages kept it in check.

You need to determine what rate of return you would like to make it worth it for you (while of course keeping in mind what the market rates are in your area for interest rate and points - in the Phila area you can generally expect private loans to be in the 11-14% range and 2-4 points - but there are a lot of factors that go into the rate such as LTV, strength and experience of the borrower, 1st position vs. 2nd position, and so on).

When someone goes after a landlord, is there a certain range that settlements typically fall within?

Normally it ranges from half a month to a month rent.