If you're careful about the removal, you can probably clean the backs of the tile with a grinder and diamond blade and clean the grout off the edges with a pair of nippers, but you might think about finding a tile for the shower only that would go well with the tile in the rest of the room. Just something to think about.

I'm a Realtor with a bathroom that houses a washer and dryer. On a personal level I HATE IT! Its in our main/guest bathroom on the second floor and its often "occupied" when I need to get in there to do laundry. It's so annoying that we're planning to change the space by adding a new wall & new door so the bathroom has a separate entry. My thought would be to create a nice linen area or build in a secondary closet in the bathroom instead and leave the W/D where it is. On a professional level I've found it to be a real hit and miss with buyers. It can depend greatly on the size of the property and where else in the house the laundry could be. If it's a small home and the only other spot is the basement, garage or not at all, having it in the bathroom is a plus. However if the house already had a dedicated space for the laundry with easy access, the reaction is often not so great. In our situation, there was a dedicated laundry room by the kitchen on the main level. When the W/D were moved upstairs, the laundry room was converted into a walk in pantry. I love having the W/D upstairs as well as a walk in pantry, both were positive changes however I don't feel like the original homeowner took the remodel far enough. Instead of creating a space for them and making it look like that was where the machines went originally they just dumped then in a corner of the room and the job looks unfinished. This bathroom was originally a small 4th bedroom. By the time we finish with the update, the laundry will be in its own little "nook" (formally a bedroom closet) in a hallway and the bathroom will be it's own separate space.

I just finished a remodel and replaced the shower/tub combination with a great shower. I really couldn't tell you how much it cost because your costs would depend on the cost of labor in your area plus the materials and fixtures you choose. My showers were expensive because they were taken down to the studs. The rough plumbing including the drains had to be replaced. Both the floor and the walls had to be waterproofed. I also opted for relatively expensive finishes - Encore tiles and marble basket weave floors with Phyrich fixtures. I live in a jurisdiction which required multiple inspections before work could proceed including flood tests for the shower pan. The work was done by a licensed plumber and the tile work was done by a really experienced tile setter so labor was expensive. The end results of the intricate tile designs were done really well and so I have none of the horror stories that are rampant on this forum. I love the end result and I also am as sure as one can be that my new shower doesn't leak or have structural issues. Getting rid of the tub/shower combination was one of the best things I did in my new remodel as the end result is both highly functional and - at least in my opinion - beautiful.

I'm sure it was easier to remove because it was failing. I don't think he used any chemicals to remove the silicone, but he did use something, probably the alcohol, to clean it up and then replace it. It looks fine (mind you, the tiling/shower frame levels in the shower are well done, so he didn't need to cover up big gaps.). I don't think this is necessarily going to be a "can of worms." It might not come out perfectly because of the gaps, but it's not like silicone is all that difficult or messy to deal with. I definitely wouldn't consider putting more silicone over the existing stuff.