Sure, but $5/month is still $60/year. You could probably buy a new Raspberry Pi every year and pay for its electricity for that kind of money.
(This assumes you already have an internet connection at home, of course)
(This assumes you already have an internet connection at home, of course)
You also might miss out on a public IPv4 address, but that's whole 'nother issue... FRP (fast reverse proxy) is a decent workaround for this.
I bought a Dell precision 4600m (3rd gen i7, 4c8t, 16gb ram, 480gb ssd + 750gb hard disk) for 50€+vat.
It was taking the dust on a shelf.
It's perfect as a low end home server.
I was doing this for some time and all the nuances with it (assuming electricity and internet are cheap, which isn't the case) makes it still unprofitable on the long run. ISPs usually have really bad upload, port blacklist (e.g. irc), connection unexpectedly drops during the night or day, DNS resolvers or forwarders usually are miss-configured and so on. Support for requests outside "my internet is not working" is often zero (e.g. "your DNS isn't configured properly").
I didn't even start with DDoS (ssh, http) attacks, port scans and even crawler hits (some crawlers by even reputable search engines can be nasty) - all these things will eat your monthly quota without even serving a byte of your site to human visitor. And don't forget visitor impatience these days - if site isn't loaded under a second or two, no more visits :)