PA is pretty crime ridden so I would avoid.

This means expect tax increases, expect HOI increases, expect tenant issues, PM issues, capex issues, everything in between.

What would be the best way to do this for tax purposes, liability, and breaks?

A lot of forum members are very knowledgeable in their respective fields related to real estate investing, whether that is real estate sales, wholesaling, flipping, rentals, lending, self-directed IRA and Solo 401k investing, or tax and legal guidance.The site has quite a few tools that can be helpful for new members.

I’m getting ready to look for my new primary residence in the Seattle area but want to avoid all the bidding wars and am fine waiting for a while.Would it be feasible to secure land that can accommodate at least 2 homes.

This is as much to keep accounting and taxes easy as it is anything else.

Makes this a business purpose loan and avoids Dodd-Frank, SAFE Act, and the like.

It would give you an opportunity to get real estate exposure anywhere in the country, but avoid the issues you are concerned about. 

I am attempting to avoid a neighbor dispute about an oak tree branch hanging over their property and would like to consult with an attorney to be clear on the local law.  

Just make sure to clearly outline the new terms of the extension in the addendum to avoid any misunderstandings in the future.