One of my best tenants, a tile setter who works with builders finishing interiors of new builds, has run into a lot of bad luck.

Use pocket doors to the hallway so you do not have to deal with the swing in the smaller bedrooms.Alternatively you could run the hallway on the interior side of each duplex and move the bathroom's plumbing over the 3 feet needed. 

Property needed both interior and exterior work ($20k) All in 94k, bank ARV expected to be $125,000 our better.

Renovated kitchen, adding new flooring in bedrooms and kitchen, new interior/exterior doors painted the interior walls/trim, new plumbing fixtures and a new fresh color and cut down trees and landscaped yard.

Full interior remodel.

Sometimes you just need a camera and an experienced plumber, though.Paul, tree roots can be from trees over 30 feet from the sewer line, the roots search out water supply and will enter the pipes and literally stop the flow of everything inside, there are many methods of cleaning the interior of a sewer line, one I liked a lot is the high pressure water cleaning, scaling is not the problem I changed a main sewer line for a customer after the cast iron was broken and literally stopped all flow of the line, this is an extreme case, one that I never encountered in over 24 years of being involved in the industry of housing and construction, many will try to sell you a big repair in order to make a big dollar, personally I would want to do a complete video inspection showing the entire run all the way out to the street main, I would want to be present and take pictures then if want to post the pictures I can better understand the exact nature of the problem and give a professional unbiased opinion, I have seen it all in my industry, one part of me is almost jealous of the companies that sell people big ticket items when in fact it is factually unwarranted but I am not in the business of stealing peoples hard earned money under false pretenses.  

I planned for interior painting.

Redid the entire kitchen & bathroom as well as painted the entire interior.

We had to replace windows, flooring, kitchen, appliances, walls, ceilings, painted exterior and interior, and lots more.

The property also needed a bit of work to update the exterior and interiors which was a great value add opportunity for us.