And that last response from Bearsfather is the best advice you are going to get.
Look at all the CNBC shows they are doing on dispensaries this past year - every single one of them says they are paying sales tax to California, and other taxes to the Federal Government.
Definitely create a legitimate LLC (Limited Liability Corporation) and consult an accountant - but not in that order, consult the accountant first, as they can advise you better on what type of corporation or other business entity you'll really want to create for this.
Last - remember, even if you don't *ever* do any business, it's a smart idea to always have 1 or 2 LLC's created for you - that way if you ever decide to go into business, any vendors can see you've been in business for years & years, banks see the same thing, etc., etc. I learned this long ago when a company I owned failed - yes, good honest people can have companies fail - always have another established corporation of some kind ready to start doing business that has been around for some time, they are all kinds of tax advantages.
1.) See a GOOD CPA.
2.) See a GOOD attorney who has experience in this field - and between the two of them use their advice on what kind of business entity(s) to create.
Good luck, and give Bearsfather a big THANKS for his excellent advice.