is there a calculator of some sort to see if it is worth mining with a bobcat for helium? I live in a smaller city and not in a major city so not sure if I would be earning $2 or $30 a day. How can I tell? Just trying to understand.
Not really.
You can look at
https://app.heliumstatus.io/ and they have some good data around miners in your location.
or this app is good too