I have the inspiration to work on 100D, since it's also share a lot of similarities with 650D/700D, 1x3 mode and x5 expanded preview already proved to work (which means it's easy to port 100D to my custom build, with high chance of success).
If there a 100D user who is willing to contribute and port 100D to
my builds, I can help (beside there are many helpful guide in the forum), it's only matter of using current code and fine-tune it for 100D, you need some basic understanding for C lang, ML code and how things works together.
Back to the topic, I can accept donations for X model as long as I have inspiration and willing power to work on it.
In general it seems difficult to find one 100D donor (even if we found one, forward steps could be more complex to donor and to me), better idea to collect small amounts of donations from multiple 100D users who are interested to see 100D support in
my builds, at this time of writing running a personal donation address isn't a clear step to make (will give you updates once it's cleared)
Well, for users who are willing to donate for 100D body, I made survey to get some statistics, you can go through it from here:
https://docs.google.com/forms/d/1REiDli8lOOIAFKMJwPLoW5YKSm1b5Y1CziCRikGIT6A/No gmail sign in required, please run through this survey once per user.
Currently I have no idea how much 100D would cost, used 700D with 18-55 is being sold for ~315-400 USD , used 600D with 18-55 for ~250-285 (no idea for 100D price here, will do a search, it's probably ~300-350 USD or same as 700D), it's hard to find here a camera body alone for sale without a kit lens.