IMHO, YMMV
I would say having a few blades that you enjoy would be sufficient. But...I have added a lot of blades over the last ten years for every reason under the sun.
Do what feels good and that you can easily afford. It is easy to spend a lot of money on the "hunt" for blades.
Enjoy the hobby and the shaves and then consider what will be the best for you and your finances.
Be well and prosper!
~Richard