Architecture for SharePoint 2013 Portal

[Maher Elsayed]

I am building a sharepoint portal for providing services for customers. the customer uses this portal to submit request that includes his data and his attachments. The attachments will be uploaded in a document library and the data will saved in a sharepoint list. the expected count of requests that will be provided yearly is 5000 requests, and every request includes 10 attachment files. What is the best approach that I should follow?? 1- using SharePoint list for saving the requests in & using document library for saving the attachments. 2- using list & document library. and make folder for each year in the list and document library. 3- using database table for saving the data and using the document center in sharepoint for saving the attachments. 4- there are another approaches for this user requirement . Thanks

Maher Elsayed