@Daniel Lin
I would talk to a realtor like mentioned above. I also look at it a few ways: are you going to be living there as it's your primary? If so, is the remodel something you want and will enjoy for some time? I feel sometimes people get too caught up in ROI and maximize the dollar. Enjoy it as well!
That said, typically kitchens and bathrooms have the best ROI as well when selling a house. We always update ours when we do a remodel. We perform all our own work but for renters, they love seeing the new fixtures and same for buyers. It's intimidating for your average home owner to go through the remodel process so having it done usually will net more or at least sell the house faster.
10k doesn’t get you much now a days. Granted I haven’t got a quote because we self perform, I don’t think 10k is unreasonable. If I was doing a bathroom remodel with a tile shower, I would be charging about that if not more. If it was just flooring,vanity, toilet and a light fixture that should be a lot less. Bathrooms are small but they are a lot of work to remodel. I found this out on my last gutted bathroom.
Lastly, consider the materials that were quoted. An all tile shower will be more extensive than a tub with tile surround and same with a real wood vanity compared to the particle board version. Just my 2 cents.