Bluetooth / Any experience in freelancing for the FreeBSD Foundation?

Hello everybody,
I am currently considering to work on the FreeBSD bluetooth stack. I am hacking around on the very experimental BLE tools by Takanori Watanabe [1]. At the very least, we could unify the existing frameworks - bthidd, blued by Andreas Kempe [2] and FreeBSD-BLE - into a single daemon with CLI and tray app or something. The entire architecture however should be put into question and perhaps we should consider supporting Linux drivers and porting bluez.
Anyway, that would be a major undertaking and since I am looking for (additional) income, I was also considering to get this financed by the FreeBSD foundation. People are often complaining about FreeBSD's BT support on the desktop, so this might indeed be attractive to the foundation. Which takes me to my question: Does anybody have any experience in working for them and which rates would be appropriate? I am totally new to freelancing - actually I am still trying to answer all bureaucratic questions associated with it. Actually, I would need to involve a FreeBSD committer anyway if we want to get stuff reviewed [3] and eventually committed into src or ports. That would be a compensated collaboration. So if you are a committer and interested, at least in discussing the matter, please get in touch with me! Or forward this post to somebody, who could be interested.
Best regards,
Robin
PS: There have been several attempts to improve FreeBSD bluetooth support. Andreas Kempe's patches are still not committed and he's given up on it. But if we involved a committer from the very beginning, I think we might get something done this time.
PPS: I do see a problem with the financing, though. The foundation states in its Proposal Submission Guidelines [4] that they won't pay industry standard rates (see 1.6) and in their example submission, the contributor proposes $1000 for every milestone, roughly every month, which does not sound reasonable at all.
[1]: https://github.com/rhaberkorn/FreeBSD-BLE
[2]: https://www.freebsd.org/status/report-2022-04-2022-06/blued/
[3]: https://freebsdfoundation.org/get-involved/project-proposal-overview/
[4]: https://freebsdfoundation.org/wp-content/uploads/2017/06/FreeBSDProposalSubmission.pdf