What kind of electric service do you all have? I'm not going to pay for 3 phase, not necessary at this point.
Is 200 amp enough? All LED lights will certainly reduce the draw there. What big draws am I missing;
AC in office
Big fans in shop
Heater (source TBD, but still gotta move the air - unless I heat the floor)
Keep in mind that a lot of industrial equipment runs off 3 phase. 3 phase welders and air compressors are cheaper used than single phase. I bought a 10 hp ingersol 120gal compressor for $500 recently due to it being 3 phase. It's about 5 or 6 years old and in great shape. For the most part, the used market just isn't there for 3 phase used equipment. Most factories are just going to buy a new one. Also the amps per phase it lower so depending on how the bill is figured, it may save you money every month. Large building a/c just about has to be 3 phase due to the power requirements.