I made a portal for my freelance clients. Should I go further?

I just finished the first version of a client portal for my freelance customers. It's a place where they can log in and easily get a copy of our contract, invoices, etc. Basically I can add links or upload documents that I want them to easily find.

I also will list out major project milestones and list their status (in progress, completed, etc).

I mainly started it to scratch an itch and I have some ideas for future improvements that will make some things better for me.

It got me wondering if I should try and make a saas version of it for others to use?