No. A lot of old hardware can be used as well.
Discussion
How much does old hardware cost? 😅
Somewhere between free to pocket change.
From 1st Gen Mac minis with $65 worth of upgrades. (Additional time replacing firmware to take advantage of added ram )
To just adding a larger drive to an old Dell optiplex that someone didn't want.
Under $100 for something to experiment with is a pretty reasonable target.