Which server type is most cost-effective in the long run for small businesses?

Virtual server offer most cost effective in the long run .Lower cost than physical server and less maintenance. For flexibility they can choose cloud servers pay for what they have used.

Do I need to pay monthly for all types of servers?

For physical server require yearly payment.
Virtual server require monthly payment.
Cloud servers offer pay as you go method

Which server type is best for startups and why?

Which server type offers the fastest performance?

Can I use a mix of physical and other servers together?