i have my shop around 85-86 pedro in the winter, larger tanks ill use heaters, but most part im year round heating by temp of my shop. i keep mine around 76-78 then QT rack is easy to bump up with a heater in the sump or whatever ya know? just my own .02 !
However im working with around 2000 sq feet, in the past 650 sq feet, so your space is much larger, maybe invest in some barrels and get some fires going!! JK!
take care hope it works out.