Asking for money before you even know someone can feel creepy.
And it may not be appropriate. But....it probably is.
This potential donor knows why you're there, right? At the very least, they saw the signature line of your meeting request?
Think of it this way: if they know what you do, then it's actually weirder not to talk about money. Right? Kinda gets things off on the wrong foot?
Honestly, if you don't say something on this first visit, it only gets more awkward later.
Here are a few approaches that may help (thanks to peeps on Office Hours last week for asking!).
If s/he already gives at any level: