How much do engineers charge?

I am demo'ing my bathroom. I have tile / some type of cement board and then wooden sub floor. Can I pry the tile and cement board off the wooden subfloor with a crow bar? How do i remove the thinset from the wooden subfloor? And specific tools needed? Thanks!

Morning all! I'm adding a new bathroom to my basement and will have a 48" x 35" fiberglass shower in one corner. Since it's in the corner, two of the three shower walls will just attach directly to the wall studs. What's the best way to frame in the third 35" wall? Does it need to be a 2x4 + 2 drywall widths? I'd like to keep it as thin as possible to avoid taking up a lot of space - it's not a very big bathroom to start with. And primary purpose is just to hold up the fiberglass. Related to this, I'm not sure yet which side of the shower I'll put the faucet and controls on. If they were to go in the third small wall, does it need to be wider to accommodate the plumbing? And if so, how wide? (Standard 2x4?).