Problems with a project

I'm considering using my current Free account with Zoho in order to do the following:

-I'm starting a website and want to offer to my users your document/spreadsheet embed tool to publish my spreadsheet (with all calculations and the template)
This way, users could use the template I have built and play with the numbers and filter certain data to generate a reporting.

-The data that I'm using is available from a web link for direct download into a zoho sheet form a third party website.

-In order for all calculations to work properly, I need the entire workbook (from the third party link) which is a file that is about 20mb in size. I would prefer that the file be directly downloaded automatically to zoho by programming it directly through zoho to download the data. HOWEVER; the file also contains too many cells about 1.1 million.

-I would like to be able to use your program for this project because Zoho offers some unique tools, that can't be found elsewhere. Is it a possibility to work something out with you, for some type of paid package that would allow me to have many more cells available and larger file upload limits.

I currently have your plugin tool or add-on that is available for Excel in Microsoft, however, once the data (regardless of file size or number of cells) hits your online system it won't allow all of them to be in the sheet.

Mainly, I would like the capabilities to use your embed/publish tool to make the spreadsheet available to my website visitors. Is there any way to arrange a way to make this possible with the large files that I presently am working with. I'm able to pay for a solution to this.

Please let me know your thoughts.