Monthly reports can be provided about completed development work to hold accountability for how the vps is used and what contributors have shell accounts on it and for what kind of development they are being used.
For the record, I've tried to self-host a wiki before, but my devices is in the process of several upgrades from 10 years old hardware (and using this for development means that I must share my home IP with the rest of the group and/or in release announcements. This is inconvenient.) It would be great if this kind of upgrades did not interfere with development work of the group. I've tried to use toolforge, but using this for hosting a wiki (without root access) is exceedingly difficult and I didn't even try; developing tools in perl is hindered by lack of root access to install debian packages.