Friends in NY expressed that they had bought some MTG product and started to play casually after a long hiatus. However the whole $$$ problem presents itself, apparently with one person in the group immediately going and dropping cash on powerful cards to get an advantage over everyone else. Typical shit that sours casual playgroups in a flash.
So I figured I'd take my collection and build a Cube from it, round it out with some online purchases, and bring it with me next time I'm down there. Cube is a great solution for avoiding power imbalances among the player base and not requiring a constant money investment to keep things fresh.
I went through my collection of loose cards (not going to break down my duel deck sets and my five commander decks and all that), and I have about 180 vaguely Cube playable. Then I ordered common+uncommon sets of M13, M12, M11, Avacyn, Innistrad, and New Phyrexia, since I don't have any cards from those sets and they're readily ebay available very cheap. I'll round that out with 30-50 singles card purchases for some affordable iconic cards and bombs/fatties (not the overpriced new hotness in standard or any planeswalkers or legacy staples, so not much $$), probably remove 1/3 to 1/2 of the loose cards I've already set aside for the cube once the rest comes in, and that should be enough to call it a day with a 360 card cube set.
It's probably a bit too much work for the hypothetical payoff, but it's a neat little project. Half the time I fly out there I do stupid shit like go buy theme decks and boosters or deck builders toolkits on a whim to have some casual deckbuilding fun with a friend anyway, since all my cards are elsewhere, so this is a lot more sensible.