Hi There,
Your requirement is simple. The details that I can understand from ur posting is below:
There are 55 separate excel files, each have 20-50 lines of data on it, all these individual file need to be clubed into one single file that has all 55 files accessible via a bottom tabs of the excel.
If my understanding is above is correct, which I think it is you can provide me the project. I can provide you with my assurance that the data will be protected and project will be delivered on the time