Your parents are probably footing a large electricity bill for this running hardware unless there is a revenue stream for your services? Either way, hats off to your folks for supporting your interest.
I know, my smart plug reports around 60€ a month of costs. Most of it comes from the massive amount of hard drives, I try to pay most of it myself with money from side projects. Anyway, I couldn't find rentable dedicated servers with this much storage for less than 50€ a month, the upfront costs of new, energy efficient and powerful hardware is too much, and I truly enjoy running these servers myself.
About the noise, my room has a small mechanical room and that's where the servers are located, the noise can't be heard from the rest of the room.
IMHO it's a good way to get your parents to pay for your hosting costs without having to beg :)
I was in a similar situation regarding storage. I ended up having to upgrade the drives for fewer bigger ones but there are other ways to reduce power consumption like putting your storage server on a timer and turning on WoL so that you can wake it up out of those hours if you need to. Obviously this is not possible if you are serving files to other users 24/7.
You could be right — but it's hard to resist the cheap hardware you can find on eBay. I see numerous Hyve Zeus 1U servers on eBay right now for a couple hundred bucks — just add an SSD.
About the noise, my room has a small mechanical room and that's where the servers are located, the noise can't be heard from the rest of the room.