Buy hosting or put your server?

Good habren!
My first post and for what reason.

Our company develops sites and belongs to a mega-holding. And this holding decided to create a mega-news portal. Ideally, in a year this portal should become the main online media in the federal district. That's it.

Naturally, a question arose with hosting. The fact is that I used to be freelancing and the projects were not very large. So the hosting from sweb.ru was enough for me .

But this will not be enough for the current project.

Is it worth it to look for something or do I need to install my server?