Pellet burning stove questions

I’m considering getting a pellet stove for my garage.
It’s 30′ deep X 32′ wide with an 8′ ceiling.

I’ve been seeing stoves for around $1000-$1200 at Home Depot and various farm stores. Some have pretty decent reviews, some don’t.

Burn time is a concern. I want to keep it above freezing and only bring the temp up when I’m working out there. It seems like most of these stoves have about 5 heat settings and burn rates of about 2 lbs/hr minimum. Does that sound pretty normal? That would be a little over $5/day to operate at the lowest setting.

Maybe I’m being unrealistic, but I was hoping to run at around 1lb/hr and stretch out the pellet usage.

Some of the stoves say they will take a thermostat. Maybe that would help with the usage?

I’d appreciate any info on this before I pull the trigger.