Trina, I used to buy my soils pre-mixed except for the specialty soils I used for poinsettias (10,000 cuttings per season) and Easter lilies (@ 2,500). And yes, they often came in frozen. My greenhouses covered about 8,500 sf and was hot water heated with 3" pipes under the benches. The bags usually did'nt take long to thaw...
PF, despite years of using bench and power tools, I still always proceed cautiously. I am going to be manufacturing a blade guard for the exposed portion of the blade.
Other plans include a lean-to shed off the side of the garage with in-feed/out-feed roller tables to assist with re-sawing logs, poles, beams...