I don't yet have an estimate on cost.I've never used insurance for something like this because A) I've never had an expensive repair and B) I fix most stuff myself on my Denver units.Question is: Should I file a claim or will the insurance company raise my rates so much that it makes it not worth it. 

Perhaps if your partner was a general contractor or handyman type there may be some merit there to reduce costs / increase profitability.If your partner enjoys deal sourcing, a better move might be for him to become an agent - so he could legally collect commissions from finding deals and managing properties for multiple people. 

It's basically a legal 2-unit that can cashflow $900/month.

Or really they were ALL pre foreclosures when it was legal to do this in OR and WA laws changed in 08.

I am having trouble following you can always send the money to an insurance company. 

Ineffective or Absent Conflict Resolution ProcessEvery successful group of people needs an effective conflict resolution process characterized by:simplicity to understand and remember;quickness to start and complete;a clear vocabulary.My company, Livingsmith uses and recommends the 5-on-5 Process for conflict resolution in co-living homes.2.

Your estate agent and the title company should be having them pay any unpaid water bills upon closing - this should be shown on the settlement statement.

Petersburg area, resulting in highly–profitable investments.If you need professional and courteous property management experts for your multifamily, single family, condominiums or town home, you've found the right company!

All existing STRs with 2 days rented in the last year will be granted legal non-conforming status.  

It may sound nice to pay a 5% management fee but the extra fees can add up to be more than the other company that charges 10% with no add-on fees.