With the recent addition of a heating system though, I have now been able to turn on the water - sort of.
There were problems with the fixtures. The deep sink was cracked completely through where the support rails were located... I'm not sure how or why a sink might do that. I've never used it.
The toilet was disgusting, and everything inside the tank needed to be replaced.
Lastly the light fixture was pretty dim for such a large room, so I needed a fixture with more bulbs.
Below: Home depot sells this little gem for $99. They call it a "Freestanding Laundry Tub Kit". I screwed it to the wall and call it a shop deep sink. Included are the supply hoses, faucet, and all necessary drain piping. The faucet pulls out and can be used as a spray wand. The sink also has a lower shelf and a little bar for hanging cloth. Not too shabby for 99 bucks.
New four-bulb light fixture (with 7 Watt LED bulbs). It's a little foofy, but it puts out lots of light for very little wattage. New sink, and a clean toilet with new internal parts. Best of all, the plumbing now won't freeze and damage the shop.
UPDATE: I added a medicine cabinet for first-aid and soap storage, as well as a hands-free liquid soap dispenser.
I would have preferred to install a sink like the one below, but the basin alone is well over $400.