ら is a suffix indicating plurality. A common visual pun based on this is an image of several turtles together. (カメラ).
The use of "question words" (だれ、どれ、etc) with a following particle is, I think, sort of hard to wrap your mind around at first. It means "any/all of ~~~". Imagine you have three items A, B, and C, each costing a million bucks. Someone asks you どれが高いですか? You could say AもBもCも高いです, but that's unwieldy. You could say 三つとも高いです. Or you could say どれもが高いです. Think of it as a sort of equivalent of "whichever" (by extension, "each and every one, without distinction between any of them).
The translation would be something like, "These things are all just items that cost (a lot of) money". The implied value judgment that one is to take away is that the speaker doesn't have a high opinion of the worth/value of their choice of how to dispose of their disposable income.