Migrating to Laravel

Hello everyone,

I decided to migrate old custom php SAAS system to Laravel for better coding experience, easier maintaining and expanding of software.

At the moment saas wors as ecommerce platform with about 500 customers, each customer has about from 100 to 2k sales per day and each customer has its own database. I am thinking, is it worth to migrate everything to one database or leave separate databases for each customer? The biggest concern is does mysql will handdle such ammount of data in one database( it will be about 10k filterrable records per day). At the moment everything works blazing fast, web and mobile apps responding very very fast. Why i want move everything to one database ? Because of database maintaining and expanding. When i decide to add extra column to database i have to do than in all databases and then test them, and it is very hard and lots of time eating work. So i want to make everything as simple as possible, but with maximum performance.