Looks good! Nothing a little Rust-O-Leum, a few wire wheels and an electric drill or two can't fix up!
I thought about going a similar route, but decided to minimize as many water pipes as possible. The last thing I wanted to face was a big leak. So no dishwasher or washing machine for me. Going straight sink for dishes, and portable hand powered for laundry (3 Hard-Working Hand Washing Machines | Green Cleaning Magazine
Great choice for composting toilet!
I'll be following!