I should rephrase that. Probably about 5-6 times a year. Because I try to keep healthy I actually don’t use enough of my product to brew more. But I’ve started a lot of cooking with beer and I do enjoy it. I’ve thought of doing a lot more small batches.
I have the Anvil 6.5 for exactly that reason. I use it for 3 gallon batches. 3 gallons works out to about 30 bottles. A case plus a 6 pack.
I originally went with 3 gallons because of container and carboy sizes. I can ferment in a 5 gallon carboy and they make 3 gallon carboys for when I want to secondary, settle, or bulk age. I have heard of 2.5 gallon carboys but haven’t seen them commonly available. I also have 3 gallon kegs.
It’s a hassle when I’m doing something I actually want 5 gallons of though. Like a lager for summer. I need to brew twice to fill a 5 gallon carboy or keg.
I brewed 20 batches for 2020, 21 batches for 2021 and I’m 11 in for 2022.
As you said, the 6.5 has an 8lb grain capacity. Thats fine for average strength 5% or so and for session beers, which I’m now doing alot of. You’re not going to be able to do high alcohol 9% or 10% beers. But as you also said, you always have the option to supplement with extract.
The other nice thing is you can do step mashes.
I’d highly recommend adding the pump kit.
One other thing to consider - the 6.5 runs pretty well on 110v. I think if you get the 10 you will want or even need a 220v outlet. Or it will be much slower to heat and your brew day will be longer.