I think the biggest mistake (an sales pitch) beginners fall for is that they will instantly start saving tons of money. Honestly, don't look at it as instant savings, in fact, look at it as instant expenses but the payoff.....best investment you'll ever make!
Juice is a weird one. I love Halo, I wait for the great sales and stock up. I think average cost is 25 per 30ml, the packaging and whatnot is much more professional than most but also, it is unique in flavor. Once you find one or two flavors you really like, it isn't that expensive. I had a cupboard full of various juice, most very reasonable in price that I just plain dislike. As a beginner, it takes a while to find your comfort zone.
Hardware. I started out with zigcigs 510 kits. Much more expensive, however, I went right to the vendor, was shown first hand how to use it and all my questions were asked. From there out, I caught on enough to not be to lost when I found ECF, which for a beginner is kind of overwhelming. Sure, over the months, I bought a different basic device, spent money and time on various filler mods. Then really laid out a chunk of change when I found what really worked for me. Eight months in, learning curves long over and now my costs are seventeen dollars a month for a 30ml that will pretty much last me four weeks and 7.99 for a five pack of cartos that will also last me all month if not almost two months.
Factor in all my health improvements and that I am not spending 30 bucks a week on cigs, I have no regrets, even on some of the stuff I bought that I found to be useless to me. It's only been the last month or so that haven't spent money. Prior to that but after my big initial money investments on finding perfect pv and accessories I allowed myself at first 100% of what I spent in cigs, then after a few months 50% of what I spent in cigs, I am now down to spending 25% less than I did on cigs. Now if I stop looking back what I spent, yeah, I might break even for the year once I get to that point, but look what I'll get as a return on investment if I compare it to being a smoker. The money I'll save over the next ten/twenty years because I am not buying cigs and the extra ten or more years I gave myself back in life by quitting!