@delay - Thanks! My rolling 12-month spend is about $40K and dropping fast. I'm shooting for a spend under $20K this year. Like I said, I used 3 months above because I made some significant changes at the start of the year that I wanted to separate out from past habits.
I'm not sure I'd say I'm being as frugal
as possible but maybe I'm just being pedantic. Most of the progress comes from a single area - housing. I pulled a big lever by moving from the high end of the market to the low end of the market. That's a big spread in my city, and in particular you pay a big premium for a 1br compared to a studio or roommates. I can keep pretty close to this level with roommates (slight increase perhaps), and I'm open to moving at some point in the future. I still have some luxuries in my budget that I could trim if I were truly desperate: gym ($95/mo), Hulu ($21/mo), eating out, ...
As far as if this is sustainable, I'm enjoying it so far and think I can keep close to this level in the future. It's incredibly nice knowing that I could not work for years and be okay. I like living with roommates; they enrich my life and I grow as a person because of them, and I have a room to myself when I need some alone time. I do rent; I'll probably want to settle down eventually but at this point in my life I enjoy the extra freedom and lower maintenance versus purchasing. I'm fairly environmentally conscious and minimalist (and just don't want to make millions of decisions), so I feel good about a lower level of consumer spending. It's not always convenient, but I don't want a convenient life, I want a
good life. There are a few things I want to try more of in the future - mostly outdoorsy stuff like hiking, camping, backpacking - but they aren't terribly expensive.
@NewBlood - Thanks! So far it's been a good experience. I really like some of the new neighbors and have enjoyed spending time with them. I'm not sure I ever would have gotten to know them in any other circumstances, so it's a unique situation. The meal plan has been good and very convenient when coming home after a long day and having food ready (substitutes for planning

) We have some events and dinners that I've enjoyed a lot too, and it's been fun to bake and cut hair for other people. The main downsides I've felt so far are: unbalanced participation (some simply do not participate in the community or help with chores, which can mean more work for me), differences in communication style / unproductive conflicts, and the landlord is a bit of an, err, character. Usually when I'm feeling particularly cynical or frustrated by those things, I'm also feeling very stressed or overwhelmed by work and other obligations, so I think it's just that stuff bleeding into other areas. So yeah, overall I think it's been good. I want to spend more time with those people that I do like a lot, and try to do small things to keep them happy - selfishly, if they moved out, I'd probably enjoy it less here. Of course I might like the new people a lot too, but you never know.