As a Colette main, I find the idea she's simpler than Kaeris or Ironsides pretty amusing, but that's a discussion for another topic and let's not de-rail the OP's thread.
My standard answer to this sort of question, in all games not just Malifaux, is that it's best to pick the master that seems coolest to you. Since you're new, your playing style will naturally come to be shaped by your initial master. As you branch out that'll change, but at the start I tend to think that while there are of course certain degrees of variation, in the end they just won't matter as much.
If price is your primary issue:
No master is going to be a 50ss crew right out of the box.
Colette can be cheap if you just run showgirls, since that's mostly her box plus Coryphee and/or Angelica. However, many Colette players like to have a high quality beater like Howard to prompt, and that means another master box since they are almost invariably Henchmen. Or a Mech Rider, and then summoning comes into play...
Rasputina doesn't summon and, while other people have already mentioned that her box needs more help than the others, the additional models you'd want for a Rasputina crew work well with other Arcanists too. This isn't necessarily as true with Kaeris (all the burning) or Colette (how often do you see Angelica in a non-Colette crew?).
Kaeris is a good option price-wise, because I think with a Rail Golem and your choice of support minion, you're probably pretty solid.
Ramos is a summoner, but there are stop-gaps (especially if your opponent isn't a stickler and/or you aren't doing official events or tournaments. Cheap plastic spiders and cheap 30mm bases are not hard to come by), and Howard and Joss are both really high quality models that end up in many other crews. The thing about this box that isn't necessarily true about the others is that if you become a serious Arcanist player, you'll end up getting this box at some point, even if you never intend to play Ramos.
Never played Mei, so couldn't say.