Scary how fast things move when everyone buys into the process. 

Focus on finding a replacement with strong tenant screening processes and performance guarantees.

I've never gone through the zoning change process that you mention although I've heard it can be very profitable.  

Since this is a rehab, you shouldn't have to worry about offering a builders warranty but here's some things I've become accustomed to doing to make the warranty, sale process and transaction process easier.  

I feel like that sounds simple but in reality would hold up the leasing process for tenants that are not proactive. 

Even with my former partner (who was our 'PM / GC' on site for our projects), it was sometimes tough navigating the process, managing budgets and costs, and keeping everyone in line, including him. 

That is not everyone's thought process but it is mine. 

I know it's not an easy process so I'm happy to help however I can.  

Due to item 1, adding an ADU can require years to start achieving any return (once the accumulated cash flow recovers the initial negative position).4) Adding an ADU is a slow process.

Having a GC that will provide good documentation, itemized receipts, etc. will make the process much easier I've noticed.