So I think in dollars per terahash and the numbers you just stated hurt me inside. I like the bitaxe as a project but that's expensive.

Today a S21 is selling for $23/th and a s9 which can run on 120v is selling for $7/th from kaboomracks with warranty and customer support.

That bitaxe is selling for $150/th

I'm not saying don't do it, but just know how much you're paying and what you're paying for before doing.

Older equipment is the way to go for people on a budget. Mining is not for everyone and not everyone needs to mine