Hi, there!
My name is Paris, and I was glad to see that you're looking for an Access developer. According to your brief, you want to have some VBA that will run when you press a button. This code will look at a predetermined set of queries, and if it doesn't find one, it will create it. Then it will export the results on a CSV file saved in a folder that the user will select from a dialog box. I will charge you $150 and can deliver within five days (a single milestone to release once you're satisfied with the final result).
I'm among the most experienced, and skilled Access, and VBA developers on this platform. I have completed over 295 projects successfully in six years, and I feel confident in achieving your task as well. You're welcome to visit my page (https://www.freelancer.com/u/paris2785) and get an idea of who I am and what services I provide to my clients.
I'm online from 8 am to 9 pm, Athens time (including weekends).
I'm looking forward to working with you.
Sincerely,
Paris Pallas