I think this would be a nice goal for stable builds and nightlies.
Maybe the goal could be $500 per month.
What do you mean by autoupdating? A feature that automatically downloads a new build? That doesn't require additional infrastructure, so it shouldn't need a goal to back it. I'd just need to implement it.
Yes a feature that automatically downloads new builds. Probably not needed seeing that it's already easy to manually pull the builds from the site.