Mortgage Prepayment Penalty is what it is called and if you sell under a year it would be 2% of the outstanding principal.

I know of some that won't go above $2mm outstanding to an investor. 

Taxes unfortunately go with the house/property not typically with the owner.Normally when you are closing transactions at a title company, they will help you clean up any outstanding tax issues.

Let's say you have a 3+ year relationship with a customer with $1M+ in loans outstanding and they've never missed a payment. 

Damn material prices!!

I have no outstanding debts outside of my current mortgage which is $156k Just refinanced with a 30 year.

Carpet is trashed, walls are damaged, doors ripped off hinges etc. security deposit covered rent but the rest is outstanding.

Hello,My tenant has an outstanding expense for plumbing for which they owe me $300. 

Note San Diego historically has been outstanding for cash flow for the long term buy n hold investor.  

Sounds like you have a good relationship but damn she could take you for a ride if you go in blind.