The Lee Load-All 2 is not big at all.
It's maybe 14 inches wide, 20 inches tall and 6 inches deep from front to back. And the better news is, they are usually around $60.
And you can get 20 gauge and 16 gauge parts separately if you wanted to load either of them too, so it's not a 1 trick pony.
Finding powders and primers right now is the hardest part.
Ballistics products sell a ton of different wad styles and will even sell their load data for some of their european shells and wads. Which obviously aren't as common here in the US.
Myself, I like smooth sided Remington hulls the best. The Remington STS are usually cheap when you find them in the store, and are the smooth hulls. Plus, the smooth body hulls tend to feed great in just about everything. I've reloaded some of them more than a dozen times a piece with no splitting or cracking.
You generally use the figure 8 wads in the Remington hulls since that's what are loaded by the factory.
You can buy genuine remington wads or aftermarket brands. Examples:
https://www.ballisticproducts.com/Remington-12ga-Figure-8-wad-500_bag/productinfo/030RFIG8/
https://www.powdervalleyinc.com/product/claybuster-12-ga-rem-figure-8/
My favorite part about reloading is that I can go from very mild low brass handicap loads that have hardly any recoil at all, to 1400+ fps barn burners that kick like a mule. Plus you can load either birdshot or buckshot or even slugs into the shells all the same with no difference in anything. The gun/powder doesn't know the difference between a 1 ounce load of tiny pellets or 1 ounce slug (for example). So, reloading your own gives you a lot of versatility.
I also know that many people don't like using steel shot pellets because they aren't as dense as lead and don't typically penetrate as far as lead will, but I've been using a lot of steel ball bearings in my triple ought buckshot loads. I got a 1500 count pack of "ball bearings" from amazon for about $15.
Try doing that with store bought lead buckshot.
(spoiler alert: you can't).
So, basically, I got enough steel pellets to load almost a whole case of buckshot shells that generally cost $1 a pop for the cost of a large pizza.