Hosting recommendation for network area

[Capz]

Greetings. I am planning to establish a business in the field of Networking, which I have been researching for a long time and completed an internship in (2 years ago). I'm looking to purchase a server with a Threadripper processor. Where can I host the server? What is the current status of symmetrical internet bills? How much are hosting fees? Which firewall is recommended?

I kindly ask friends who know the answers to my questions to leave a comment on the topic.