I don't see mcuh on this business partner. 

(I actually laughed when I first learned this.)10% property management fee (With separate charges for new leases, repair management, and rent collection—what exactly does this cover?)

When I inquired about it, plumber said lining, it is usually not prefect since this is PVC breakage not just pipe cracks and the cost saving is not significant enough and maybe headache down the road.I will try to get more quotes and maybe a company that specializes in pipe lining options.I was told foundation work / under slab pipe repair is common in the Dallas TX area due to soil type.

However, after waiting and testing again, the backup reoccurred.At this point, the plumber snaked the line from the cleanout towards the city’s main sewer line.

Keep this to a single page.

Probably this.

Is there anything you would add to this list?

This is not my area of expertise, so wise people on this website will likely tell me not to venture into this!  

And this might indeed require some time to pass before doing that.You could still create a single member LLC with either you or your wife as member. 

Look forward to learning and connecting with the great people in this community!