Actually you can do that quite easily without any development. You can export the entries to MS Excel from each form and combine them manually......but I think this question is not about Machform in itself.
You should be able to grant any developer access to your database through PHPMyAdmin, or your hosting service such as cPanel. You could give the developer "admin" access to the Machform Administration, to allow entries to be viewed and exported.
I assume all that data analysis will be done out side Machform.
Hoping I have understood the question and that my answer makes sense.