This allows the fix & flipper to make a little money upfront, but a lot more at the back end when we reassign the mortgage/deed of trust back to them.

.: @Jaycee Greene flip and fix, under 150kSomething like this: https://www.realtor.com/realestateandhomes-detail/1542-Haine...?

Are you looking to do fix/flip or BRRRR?

Quote from @Daniel Tanasa: Another option is to get a small cash out refinance from the house you plan on fixing up, if is in financeable condition, and use that to fix it up, while still cash flowing.

The answer is just about how you want to fix your mistake.

I had an electrician go out today to inspect and give me a quote to fix and should receive the report tomorrow. 

I'm a pretty handy guy but this would be outside of my realm, but my experience helps me understand how much this type of improvement should cost.Improvements: remodel kitchen and bathroom, paint interior, fix exterior scafolding.How should I go about finding a contractor?

Yes it's a huge problem.You should fix this correctly now.Open the walls and put in proper sound reducing insulation.

I have done a couple of fix and flips.

•Set up notifications when a listing matches my criteria.Has anyone built or tried something similar?