Northerners have salt to deal with. Down South it's humidity or stupidity, close call. I bought a dehumidifier for my Z nest and it's pulling a gallon a day at least.

You're probably pulling most of that moisture from the building materials. Once they're dry, you'll probably condense much less. Good weather stripping will be your best money spent, if you intend to keep the garage dehumidified. Don't forget to weather strip between garage door panels as well!

I have a dehumidifier in my shop that is about 800 Square feet. It runs a lot and is set at 50% RH. It was necessary due to mold growing on things and flash rusting of parts. I have it draining outside thru a short section of garden hose. Much of my shop is below grade and very well damp proofed but it still takes out a tons of water 24/7 365. Worse when the humidity is up. I didn't think I would need it originally but conditions proved otherwise.

Charles