1st you should understand that the law is stacked against you.

And yes starting researching eviction law as well.

My in-laws sounded a lot like you a couple of years ago(no offense James).

I say that to say right now you may not have cash or savings , but here is plenty of ways to get into real estate for instance getting a license , giving up elbow grease to a contractor , volunteering at an attorneys office and calling your local municipal office to see what the laws are .

So if he literally just followed the law, he'd be rewarded for it. 

After failing to find a suitable multi-family that had workable numbers we started looking at properties with guest house / "mother-in-law" suite potential and were pleasantly surprised with the options...especially with some vision.  

@Peter C.This is one of the main reasons why HOA and by-laws exist. 

So in Portland they have very strict renters laws favoring the tenants and it can be very expensive to get them out of a residence and what I’m wondering is how to negotiate that to my benefit with this seller.

You are just subject to all the normal rental laws.

@Lee Ripma is correct - as a California resident actively engaging and managing an LLC from California, California will declare nexus and require a registration, a tax filing and a minimum $800 fee each year.Marketing into other states may or may not create nexus (depending on each state's laws, so look them up) and need to register/file in that state, but as @Wayne Brooks indicated, you will most certainly need to be registered in any state where you want to sign contracts and otherwise conduct business in that state.From each state's point of view, anybody who wishes to sue you must be able to do so in the state where the transaction took place so you must be registered in that state with an agent who can accept legal service on your entity, should the need arise.