1-4 unit non owner occupied investment properties have a huge range of financing options, both government backed and privately financed mortgage options, and having a 3 year rental history puts you in a preferred borrowers category. 

I understand Service Dogs are protected under Federal Law and I can be sued and probably lose if I demand she leave. 

An agreement doesn't prevent a parent from suing the property owner when their child is hurt in the property.Section 8 means the tenant isn't very responsible in the first place or they would not need government assistance.

Most CPA/JD hybrids I meet tend to either be: (1) be a federal tax specialists/assassins; or (2) focus on one side of the practice over the other.

Your first question is easy to answer: Any government lien seems to stick, so you need to research whether those exist.

http://www.biggerpockets.com/government-owned-property.html

The government takes the money out of the poor tax payers pockets (reverse Robin Hood Syndrome?)

Interest income is taxed at regular income tax rates, so you can make the case for paying the AFR (applicable federal rate).

Anybody working in Seattle and making less than $80K are moving to Tacoma-Puyallup-Auburn- Federal Way etc. - Demand is crazy and vacancy is super low.

Obviously I find this confusing; the discounted home that is non TK has older systems (roof, HVAC, Federal Pacific Panels) and is priced 12k under ours is a pass and the homes with all those items updated, new and TK is to expensive.