@Mike Nuss Thanks, so helpful - as a newbie I had to first understand that by R1 we're talking about State of Oregon/IBC occupancy, not Portland municipal R1 zoning :) So now I'm down the rabbit hole of researching R1 transient hotel occupancy standards (for <10 people, as will be the case for most SFH structures).

FOUND SOLUTIONS:1 - This looked relatively inexpensive, but requires a window in the basement (which may not be present), and is very much DIY:https://www.finehomebuilding.com/2008/09/10/a-dehu...I found 2 - 5 on the following site:  https://www.hunker.com/12002792/how-to-dehumidify-...2 - Placing Charcoal bricks around the basement3 - Filling a bin with rock salt and drilling a few holes allowing for water to drain4 - Buying desiccant's and placing those around the basement5 - Running an electric heater, set no higher than 95 degrees.I really like option 1... but if my basement doesn't have a window, it won't work...

Complete this and repeat.I really want to believe that we had an ahha moment thinking about these scenarios but I want to ask for the anyone to poke holes through these thoughts.

Since then I have gone down the rabbit hole at BP and we have pivoted to focusing on Out of State BRRRR investing a-la-David Greene. 

We tried to charge them the lowest amount by not adding labor or materials for certain repairs for example to repair poor cover-up job for holes they made in walls, we just charged partial contractor labor and not materials.

Additionally, I do not have a well-established team and trying to make a square peg go into a round hole is not good business. 

However, since it was not purchased as a rental in 2005, it doesn't make monetary investment sense. 

I would agree with JD Martin that is pretty cheap, especially the walls which usually involves drilling 2 holes every 16" between the studs.

We inspected the home in July and the tenant showed us the hole in the floor by the front door. 

Just wondering if any one has had experienced before :I just a notice from city of oakland, RAP stating that my ex-tenant filed a petition for reduce of services, for a broken and damaged fence, hole under the kitchen sink and window handlebar broken.