Hello,
Full disclosure I haven't made an AU yet, but I have experience in developing iOS/Mac applications, and Logic Pro is my primary DAW.(I am a Software Developer and Music Producer.)
After reading a the documentation for AU plugins, I can propose that its by and large the same process.(It uses the same language and IDE I have used to develop applications)
Also, after discussing the complexity of the project I can propose a shorter/longer dates for the deliverable.
Since no prior experience in this particular domain is a red flag, I'd like to assure you of my competence and I am looking forward for you to consider my proposal.
Thanks.