Good afternoon,
This seems like a great project but may I suggest that instead of Access, you use MySQL. This will allow far better security, far more robust and much, much better at multi user scenarios. Web hosting is incredibly inexpensive so I feel that would be the better way to go. If you are set on using Access please disregard my bid. I am just trying to offer a better solution.
My standard is all bug fixes for as long as you use the system. I can host the development on my servers here in Cape Town and then will do the transfer to your live server. If you would like to have references from my previous clients, just let me know. Please have a look at the feedback I have got from previous clients.
With kindest regards,
Trevor