*grin* Trust me, I wish I'd been given that advice to start out, because between myself and my husband, we're probably somewhere into the $600-ish range in the space of a month.
But I have what equates to two Ego starter kits and a 510 mini manual starter kit (which I'm probably going to pawn off on my mom to try to get her off the cigs), he's got an Ego kit and a couple Riva kits, he's got a cache of multiple cartomizers/clearomizers and I have tankomizers/cartridges/tanks, we've got a pair of vape caddies and we share a gorgeous wooden supply storage box from VapeLogic.com, and between the two of us, we're probably up to around 40 flavors of juice. Oh, and we also have the junky made-in-China automatic-draw mini kit he originally got me that started this, plus his Circle-K carto kits he got, but those are pretty much ignored now. Next month, I plan on picking up an inexpensive box mod (I found one for about $25 that I'm curious about), but I refuse to let myself spend any more money until AFTER next payday.
But, well, we have our own levels of obsessiveness, and realistically, I've decided it's a new hobby at this point.

I'm pretty durned content with what I have at this particular instant in time, too, and while I'll likely spend more as time goes on, it's mostly going to be on picking up supplies of juice or getting more cartos for him.
And, if all else fails, I have a crapload of Altoids tins lying around the house, and I can always learn how to build mods in them!