I think one of the reasons I don't want to move to a climate where I could ride all year round, is that I am afraid I'd burn out. This definitely happened to me when I was teaching aerobics; even after I stopped teaching classes, I lasted about 4-5 more years, and then I started riding. I just couldn't stand going to the gym, even though I needed to lose weight! I understand why you are riding so much, it sounds like your DH won't continue this rate of riding, after the year passes.
I am only working about 25 hours a week, less during the summer, since I have a lot of clients away, teens with jobs, etc. I'm kind of like you, in that I am loathe to drive far for a ride start, thus the reason why I haven't gone to a lot of the Wed. rides in my group. But, I need to do one longer (30+) mile ride during the week, to do any kind of decent yearly mileage. It's pretty rare I'd do a ride this long by myself, too. I don't generally do organized (charity) rides, either. Too many people, especially ones acting like racers. I did 2 local metrics last year, and that was fine, because I didn't need to raise money, just pay a sign up fee, and I could start early ahead of the crowds. The one that was super hard is for a very good cause that gives bikes to kids in the city, but they upped the fundraising and DH refused to do it. And the other one is this Saturday, and i am leading a ride somewhere else. I also wanted to do the Soldier Ride again (I did it about 3-4 years ago) alone, as it starts in Concord and it's the one charity I believe in; the Wounded Warrior Project. Again, it's on a day when i am leading a ride.
I barely got over 2,000 miles last year, somewhat because of weather (heat), a vacation that included no cycling, and laziness. That was my lowest mileage in 11 years.