I have a 1929 house and going to gut the master bathroom, it's not very large, maybe 8x10-ish Original pedestal sink, toilet and cast iron tub. It's believed there's at least 2 layers of tile and mudset. I want to keep the sink and toilet, tub will come out (have one in other bathroom) and just have a nice walk-in shower. Main part of bathroom will be new marble tile floor, drywall walls (no tile except baseboards), ventilation fan (doesn't have now), new vanity lights, medicine cabinet; new marble tile shower floor and marble subway tile shower walls, new shower fixtures, new window, maybe making it smaller depending on time and costs, it's a big window right now that overlooks neighbor's side door and driveway. Additionally, the pipes need to be replaced between the two bathrooms (they're above/below each other), they are almost completely clogged as was discovered during a recent kitchen renovation/addition.

I have already picked out the tile and will be responsible for ordering that, new medicine cabinet, new vanity lights (currently there's a non-GFCI outlet hooked into one of the vanity lights!), shower fixtures, and assorted other fixtures/accessories. I have a general idea of what the design of the bathroom should be, would likely need a custom vanity cabinet made as there's no storage in the bathroom.

I'm not completely clueless and understand that timelines are just guesstimates on how long it will take, and with an old house never know what it entails until opening it up. My contractor who did the kitchen said if he did the bathroom, would be approx 8 weeks to do it, and I think includes the re-piping part too. That just seems like a very long time for this, but perhaps I'm wrong? I live in the northern suburbs of Chicago and don't know average what this would cost either, thoughts? I know it's all relative, but ideas offered would help, I've seen a range of timeframes and costs. I want quality and reliable work done, not quick and dirty, if that means 8 weeks ok, but if that seems excessive I would like to know so I can plan this project either way.

Here's pictures of the current bathroom. Don't try to talk me out of removing the tiles, it's uglier in person and I want it out. I love the sink and toilet and why I'm keeping, they're original so I want to keep the vintage look with the house. I hope to be able to find the right faucet parts for sink and innards for the toilet tank, it's all the original and could use updating. I've found some sources online. The sink has an integrated spout in the bowl, it's cool.

Thanks for your advice!