Hosting your own sites

I'm just so tired of hosting sites (no offence to anyone though). I've been so let down by the hosts that I've tried, I've wasted both money and time, and I've lost files in the process.

I really want to start taking matters in my own hands, and I'm wondering if it's worth hosting my own sites? Is it worth having my own servers?

How big are servers anyway, and how much would a relatively good one cost?

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