IMO, budget permitting, install a sprinkler system.
1- Safety for you and your workers (if you have any)
2- Can save your equipment and stuff in a fire. How many fires start with a little rag covered with some flammable substance.
3- You might/should save some dough on your insurance, to off set the cost.
I've worked in a cabinet shop, flammable dust gets everywhere, even with a vacuum system. I little dust near your furnace, hot water heater, dropped cig, and everything can up in smoke. Once a fire starts, your choices are
1- get out,
2- get a fire extinguisher, and take a chance of being cooked.