If you want to host something on a Raspberry Pi, you should consider using literally any other piece of hardwarelocked
There are a lot of reasons not to give them your money. They're assholes to the maker community and they openly talk shit on a lot of their customer base. That's beside the point, though, really.
It's just not a spectacular option for hosting. In order to get a Rpi competitive with even the shittiest laptop from 7 years ago, you're going to end up spending more than you would spend on a decent laptop from 7 years ago.
If it is a computer that turns on, it will likely function orders of magnitude better than an Rpi and won't bind you to ARM architecture. My entire hosting setup was pulled out of a recycling pile for free. Install ubuntu/ubuntu server and enjoy yourself.
If you intend on spending any amount of money on this hobby, I cannot express enough how much I recommend against any of that money going toward a Raspberry Pi.
EDIT: A lot of you seem to be reading this as "Raspberry Pis are all nonfunctional" and getting mad about it. Don't do that.
Edit 2: Good to see that all the stupid parts of reddit made it here
If you don't want to be replacing sdcards every two weeks, you'll need to add a hard drive with an enclosure which will also need power. You'll also need an upgraded power supply for the pi. To deal with any sort of scale, you'll need more than one in a swarm. If you don't want them just out in the open air, you'll either need to coat them or put them in cases. It just all adds up to way more than a $5 ebay laptop with a broken screen that has 20x the performance.
Don't buy garage SD cards. I have cards that have been in use for years.
Dang I gotta stop getting my cards from garages?
I have an SSD connected to mine which doesn't need external power and runs fine off the "official" power adapter. The case I have isn't the greatest (two pieces of acrylic and some stand-offs lol), but it costed 50p and gets the job done.
As for scale, you're beyond a Pi at that point.