I owned an older property, and tree root issues over time caused backups to the sewer line to the city sewer system, and I had to hire Roto Rooter to come with special equipment, camera to check out sewer lines.

You've got one more fan here rooting for you to get to 200+ doors. 

If you are going to use a property management company, I think it wouldn't make as big of a difference in where you invest.However you will need to build a network where ever you end up investing, and it usually easier to do that where you already have roots.

But where is the root cause of this problem? 

My wife and I along with our two children are pretty rooted in our current community and love it there, but are very interested in REI. 

I always rooted against him growing up.When I dug into his story I realized he has a lot in common with Michael Jordan.

Keep asking why until you get to the root reason.

Initials: _______Tenant agrees to pay for clearing the sewer drains of the Premises of any and all stoppages, except for those stoppages which the Landlord will agree were caused by defective plumbing, tree roots, acts of nature, or which are declared in writing to have been so caused by the plumber or other person who is called to clear the stoppage.

Always knew that some FHA's don't qualify but was curious to what were most of the root causes. 

Our line was broken off the main and had tree roots going through the old pipe.