I've hit on a few of these Mj related topics already, so, I will be repeating myself some here.
This thread is old, these days, you can buy CBD rich strains (seeds, or clones/cuttings. They were breed specifically for their high CBD production, and some have very little THC in them.
Far as the stuff that's legal in all states, I'd say it's not what your after, and I personally see it as crap compared to what you would get in a full out med legal state, and/or a med/recreational state. The stuff that's legal in all states is missing so many compounds, and that's why it's so called "legal".
I would talk to someone in person that has a high degree of knowledge about medical marijuana, CBD/THC oils, extracts, etc, etc.
From my point of view, all these "legal in all states" cannabis oils are get rich quick scheme's. Oils/snake oils/elixirs, etc have made many filthy rich over the last several melenia with all their health/pain benefit claims, and it's still happening.