If that's addressed, I'm interested, although my use case is different. I do contract work, mostly short-term time-sensitive projects where I need to rapidly get productive on client systems. So far I've managed this by working from a beefy machine and putting each client's environment in their own local VM. The separation of clients is important since I work with multiple clients at a time, and mixing would be a huge issue.
This works fairly well. At the start of the contract I spin up a new VM. I've got standard dotfiles and install scripts I copy/paste from a Gist, then I manually install anything client specific. I needed to spin up a cloud env recently for a client who had a very memory hungry web app. The cloud env worked well, although I noticed the latency.
It looks like Nimbus will let me spin down my "beefy cloud VM" when I'm not using it, to save costs. I don't do that currently, mostly because I don't see a _trivial_ one-click way to do it. This looks like roughly 2x EC2 pricing (8cpu/32G $0.26 vs $0.58), so reducing running hours is key. I'd want fast VM start times, I don't want to wait too long. I'd probably be interested in even larger instance types, as throwing more hardware on a project is worth it to me if it helps me work faster and justify higher rates.
(edit, looks like there's a 14 day trial. I won't try this before there's an MFA solution, but it would be nice if the trial would start when I spin up the first VM.)