Ballpark my cost, including labor etc? Probably 7k all in. Thats probably a 50% discount because I did everything myself. Someone else’s cost for the exact same thing? Likely 15-18k. Possibly more now due to tariffs etc. I saved for a year beforehand.

It took a lot of work. I had to tunnel under my home and break the drainage loose at the restroom, sink the cistern, the pumps/plumbing/fittings etc were at my employers supply house discount plus multiple liberated items from said employer. It took me about three months, working on weekends, after work weekdays etc. Lot of chipping at concrete, patching concrete. I pulled a lot of favors from some guys I know to transport the cistern, used a crane to pick the cistern over my house into the back yard. I also paid a couple of my buddies who are also jman plumbers $60 an hour to come help me plumb some stuff in that I couldn’t do solo. Even got the civil engineer involved my employer keeps on retainer since I did everything above board.

I absolutely benefitted from my work connections/coworkers etc. If I didn’t have the help I did, I’d have never done it completely solo.