The 30 hour day feeling resonates. If I have no external schedule or I'm just living as I see fit, I end up gravitating to 3am bed, ~12pm wake sorta schedule. The only real problem is that it's functionally incompatible with jobs and many other services, even fully remote

Same. For me it's more like 4-6 am bed.

I also work best in long bursts of up to 12 hours, with days of full rest in between bursts. I don't do well with a five days a week 9-5 work schedule.

And timeline urgency / time pressure tends to do well at putting me into deep flow state, whereas it can be hard for me to get into flow state for work otherwise.

Live on East Coast, take a west coast remote job. 9am Meeting is noon.

I did this for several years. It works great