A sink would be nice, but after thinking about what is involved - e.g., where to run the drain - it’s also not feasible for me. I’m guessing I won’t miss having one.I wanted a sink in my shop, but it wasn't feasible. So far I don't really miss it. The garden hose is fifty feet away and the bathroom's only another twenty. We put a sink and toilet in my wife's shop and we have to keep a heat lamp on it in the winter. I'm ready to pull the toilet and cap off the lines.
I will probably install a frost free hydrant in the yard near the garage, as it will probably come in handy. Because of a nearby water line, it will be a simple matter to insert a T and a couple of ball valves to supply the hydrant.
As for a bathroom, the house is 100 feet away from the garage. No big deal.