For the kitchen, why not consider keeping the cabinets but replacing the doors only, replace the counter top(a nice granite one) and new sink, and backsplash. Then ceramic the floors. I'm sure you could do this for less than $5G total, probably less than $3 if you bought yourself a Freud rail/stile cutter
You could make your own counter top from 3/4" ply and ceramic the top of it, as another option(cheaper, still looks nice).
You can get a stand-up shower/tub combo if you have the room for it. Some of these are in 2 or 3 sections to make it easier to move into place and install, also some have a closed top vs open top. Getting involved with a lot of plumbing changes is something I'd only do if you're going to stay in your house. Why not get a couple of estimates with no obligation, you might steal some ideas from the contractor!
Without getting too personal, Mark, are your pipes exposed on the outside of the house?
