Looks like a really nice layout for your shop, putting all of your utilities in a small room
is a good idea. You will really enjoy the hydronic heated floor, I worked on a similar shop
that utilized a small wind turbine generator that sent it's power to a water heater which
was used to circulate the heat transfer fluid through the floor. When ever the wind was
blowing he was heating the floor in his shop which was used as a storage mass for the energy.
Later on we added a heat exchange coil in his house and ran a loop from the shop to the house
and had extra energy to heat the house at times. You could easily do the same thing with solar