that sounds like a decent plan
make sure you don't pick any old zinc or magnesium - for the zinc, go with a 50mg zinc citrate balanced with 2mg copper. for the mag, go for magnesium glycinate. i used to get the one by kirkman labs but recently switched to 'orange' brand.
also, AOR multi basics is pretty awesome. (i used to get the better one but it had too much stuff in it and made my feet super smelly!)
i'm not a juicer myself, but it's a good idea. i'd just try to get a mix of colours and types (eg leaves, roots, berries etc) plus balance pro and anti inflammatory ingredients. also, even though i loooove the greens, i think kale is the one that would be the safest to have in higher volumes raw. certainly you could put some spinach in the juicer, just not too much raw.
spinach and swiss chard are more nutrient dense than kale, but to consume in high volumes you need to get rid of the oxalic acid anad that means boiling. chard needs to be boiled 3 mins, and spinach you boil it for one min. then you can eat a cup or two without worrying about too much oxalic acid.
what other kinds of food do you plan to eat?