Based on your specifications, an MR28 matches.
Aside from specs, I would focus on:
- Are the current use-cases expected over the long term or is there a potential for that to change?
- When will the customer next perform an upgrade cycle?
- Is the environment sufficiently covered by two APs?
Other than that, I suggest contacting your Meraki sales team for further advice around pricing, and the potential of getting some trial kit.