If I do it cheaply (i.e., Home Depot stuff, hire a local contractor, etc.), it will cost about $8 grand.
I rented a house for 3 months before moving into my house. Everything in the rental was from Home Depot and looked pretty good, unless you had a practiced eye you would never know it was the cheap stuff. I question the durability but in a rental durability doesn't matter because tenants will destroy everything in 10 years no matter what you buy.
For 40 years I designed, built and installed custom entry doors in multi-million dollar custom homes (not McMansions) so I got to see all the high end stuff. After that I couldn't put Home Depot into my house. There must be bathroom fixtures between Home Depot and the high end, unfortunately I don't do remodels and am not familiar with what is available.
I got contractor pricing on everything through my wholesale accounts so I added up my fixtures, sink, shower door, and tile and it came to $2500 in 2013. The labor was included in the general contractor's bill for the entire house remodel so I have no idea what the bathroom labor cost.
One thing about high end fixtures is they last, I have had zero problems with the bathroom and kitchen fixtures, they work flawlessly and the brushed nickle finish is still perfect after 10 years.
The downside is the price. The Jado cross handle lav set retailed for $688, I paid $361. The pedestal sink is $420, I paid $250. The shower valves and trim was $751. The installed glass shower price was $995, it's probably double that now.
Look for a licensed contractor that gives breaks on material costs. I gave my customers 10% off retail price on the hardware I supplied, they were happy. Of course I got 25%-35% off retail price but it's still a win-win. All they had to do was point and say "I want that", I took care of all the details.
Showrooms will charge you retail, sometimes you can find fixtures online at contractor prices but it's up to you to order correctly and make sure all the parts are in the box when it arrives. A local supplier can get you that little doohickey that is missing, not so with Amazon.