How much is home dog/puppy training?

I’m thinking about getting a home dog trainer. How much does it usually cost? I know it depends and the price varies, but what does it generally cost?

I’m thinking about getting a trainer from barkbusters. Anyone heard of them? Are they successful at what they do? Also, in general, do these (dog training) lessons pay off. That is, are they even worth it/ beneficial?

If it helps at all, I live in California.