It's cold here in the winter, which makes it a great time of year to brew Alts and Lagers. I do most of my brewing from the fall through spring. One alternative, the one that I use when it gets too cold to brew outside, is to make 3 to 3.5 gallon AG batches on my kitchen stove. That's just about the upper limit I can hit and still get a proper boil.
Thats my limit as well. That is the size of the boils I was doing when I did extract brewing. I thought about just extract brewing through the winter but I have a back log of grain I would like to use while it is fresh.