@SomeBikerDude I am so sorry to hear your wife’s diagnosis but am glad you are here since you are growing for her. There is lot’s of knowledge here for you to tap into.
As you know already there are many benefits to growing your own but challenges as well. The biggest is knowing the potency of your bud. Like @bob31 mentioned the only sure way to know the CBD:THC levels is to get the bud/oil tested. I have not done that myself so don’t know the cost associated with local labs. But I recently read a review of something called the T-check2 potency tester. It looks to be about $150 and here is a description:
tCheck 2 is a potency tester that allows you to measure the strength of your infusions. Using just a few drops of butter, coconut oil, olive oil, or alcohol, you can accurately measure the strength of your infusion in less than 45 seconds.
I would imagine once you decide on a strain and get it to harvest, an instrument like that would be vital since you need specific ratios you are trying to hit.
Wishing you the best on your grow and I’m around too if I can be of help just tag me. ~ AB