My main concern is when title transfers there is a chance the bank will call the old loan due.

Any tips on how to minimize chances of selecting awful tenants?

If its on the sand, chances are the condo HOAs are high to where you don't make any money.

The estimate I saw was that it would add $10,000 to the cost of a new house. 

Consider a new Seattle law that bars landlords from screening prospective tenants for any criminal history.Passed Monday, the Fair Chance Housing ordinance prohibits landlords from excluding prospective tenants because of their criminal history, from requiring or conducting criminal background checks of those prospective tenants, or from charging them higher rents and security deposits."

Because if you're defaulting on loans and taxes the chances are your credit isn't going to get much worse. 

I would appreciate your advice about  the correct numbers to use when estimating closing costs while running the numbers for our next purchase.This is an example of the closing costs for a rental that we purchased for $105,000.Loan Charges:  Origination & prepaid  interest:  $1,000Title Charges & Escrow/Settelment:  $1,600Impound Charges:  Tax & Insurance:  $1,500Total:  $4,100Which of the charges should be entered into the closing cost field?  

Do you want to buy and hold here and take the chance that the teachers village project will carry over?

Nail down the ARV, multiply by .7 to .75, subtract your estimate for rehab (since your new, add a 25% - 50% buffer), then subtract your fee.

You can estimate what you think the ARV is, but the bank will have their own appraisal done to determine this for themselves.