How much of tax would make it okay to you to grow legit?
None. They do not deserve to tax it, and there is no way they can tax your personal grow. But let them think they can if they are that stupid.
Tell Ahhnold out in Cali you agree, it should be legal and taxed. Then stiff the dumb fucker on the tax when it gets legalized. There's about 50 years worth of payback being a bitch before they can consider charging a tax on what should never have been illegal.