Hello tilou:
Can I safely assume you are writng from the USA? If yes, my help may not be so useful as I understand not every state has legalized cannabis. I am writing from Canada, where it is legal everywhere.

But here is my response: Cannabis dispensaries are almost as common as coffee shops here in Canada. As to price: some forms such as THC gummies are highly processed and therefore expensive. The cheapest form to buy cannabis ( 'medical' or recreational - it's generally comparable prices ) is dried "bud"
( flower&leaf ). This form has to be smoked , or better and more healthy , "vaped". That requires the initial investment in a vape pipe, which range in price at online stores from "$85 - $385! I have had total satisfaction for years with the cheapest pipes. I recommend you Google "G Pen vape pipes", their cheapeat pipe is a pleasure to use. Honestly, I don't why anyone needs the expensive numbers! As to cannabis price, I buy a 40 gram foil bag of bud bi-monthly for $75. It's worth it for the relief management I get.
I hope this helps.
WT