Your suggestions, please

As we prepare David's apartment either for his return, or to rent out, or sell, whatever he decides eventually, we would like to get a few repairs done, especially in the bathroom.  Does anybody know people who do good work at reasonable prices for the following types of jobs:

repairing/replacing sheet rock and painting

re-coating, covering or replacing the bathtub

regrouting bathroom tile 

plumber to unclog bathroom sink (Richard knows somebody, but just in case that person isn't available, back-up suggestions welcome)

We are also mulling over the possibility of creating built-in shelving--carpenters, anyone?

As always, many thanks to all of you. You are so supportive and wonderful!  One positive thing that has definitely emerged from this crisis for me is a renewed sense of community.