1 BAY GARAGE BODY/ PAINT SHOP

I lived w/ my dad for about 30 years. He & I built a 33x60 garage w/ a paint booth. When my dad pasted away we sold the house & garage. I bought a house w/ a 20x 30 garage. I would like to continue doing body & paint. Anyone do body & paint in a 1 bay garage ? What do you use for heat ? I have to do some wiring & I am going to try to keep every thing 120/110 volts. 110 welder 110 air compressor 110 heat source Im thinking in the future extending the garage another 25ft or so. That will be for painting only. But for now 1 bay.