RY4 Double, Caramel Candy and Vanilla Swirl is one of my fave DIY mixes- just made another batch. I love RY4 Double- I ordered 3 on my first order- glad I did!
Some folks have said they don't like TFA butterscotch, but I have 2 recipes with it I like enough to keep in my daily rotation. I've only made one mix with RY1, but it's a success and I think it's probably an easy tobacco flavor to work with. I use French vanilla and toasted marshmallow fairly often, too. I have coconut candy because coconut extra was out of stock.
I wanted to try 555, banana nut bread, cinnamon danish, watermelon, Bavarian cream and a few others, but they were out of stock when I made my order.
As for equipment, just get 14G needles- VG is hard to draw with them, 16G would be even harder. The smaller the needle size, the larger the needle- a 14G needle is absolutely huge compared to a 20G needle. I'd ditch the pipettes and beaker, and I haven't found a need yet for a graduated cylinder, either. I'd also dispense with the 3ml bottles- get a few more larger ones. You can mix small amounts in 10 ml bottles, but not so much the other way around- and 3 ml bottles are tiny! What I use most as I'm only mixing either 6ml or 10 ml bottles for now, is a 10ml syringe with 14G needle for VG and PG, and 1 ml syringes (no needle-I got mine from another source and they have a slip tip rather than luer lock) for flavorings.
You might as well order enough to make the limit for free shipping ($65 IIRC), since you're close to that anyway.