They all vary. For a complete one with your tastes Id plan anywhere from 8-10k in my area. Whirlpools alone can be 3k or so. If you can replace the fixtures using the existing plumbing it will save you alot. When you start relocating stuff thats when it starts to get expensive. I just helped my brother with his, we did everything, new window, replaced tub with a 3ft shower, required light carpentry work, new sheetrock, new fan/light, insulated, new toilet lav, same locations, and tile floor. He probably has $2500 in it.