If you can make a little profit out of it (or make sure you don't incur losses), then it's a viable project to continue; to market. There are altcoins out there providing "staking boxes" and they are all nicely packaged raspberry pis for sale around $100 equivalent, which is more or less, at cost, including all the hardware, a nice case, memory card, power supply and pre-installed OS and software.
The biggest issue is the drive space & power.
You need a good SSD or a really good spinning drive and a more powerful RPi to make a
BTC node. Or a micro PC.
The cost is going to put you in the $190 range more or less before your time. Just look at what is needed for the minimal Raspiblitz.
You can get away with a lot less on most alts.
-Dave