How to tweak a lot for NIMBY to R$$$

[Spinmaster 75]

I'm not a modder by any stretch, but I have tweaked a few lots for my own purposes from time to time. Found it necessary once I discovered many old bus stops consuming more electricity than most houses and offering 100 jobs in a 1x1 bus stop. And occasional other "nice things" that had unbalanced stats (usually not the creators' faults, I understand... nonetheless I'm left with the choice to either fix or discard them).

Anyway, I've been looking for some way to finely control/influence where the rich build. Using taxes to keep them only in certain tiles... isn't granular enough. Denying water also prevents lower-wealth stage 4 and up; also no good. I suppose I could put other nasty NIMBY things, but... I'm trying at the same time to not to be a bastard to the less fortunate in my city. Then yesterday, it struck me, as I was driving through a particularly wealthy neighborhood, and I noticed the conspicuous lack of bus stops... "duh, rich people don't ride buses." Even in the rare case they do use mass transit... buses are pretty much out of the question, usually. So I'm thinking I want to use them to granularly control where in a city I want my rich people. I usually sprinkle my cities with bus stops anyway. And the people use them, some to get to work, others to get to other mass transit networks. Unfortunately the rich of course also build near them... but never use them. So... if I could tweak my bus stops to deliberately fend them off, then I can simply not put any bus stops where I want the rich neighborhoods to be.

But I'm not sure which exemplar to fiddle with. My guess is, I must add the "Desirability Effect Values" exemplar. "Radius in cells, Max effect, min effect for each developer." But I'm not sure how really to add the values. How to use the tool, yes, but  how many, or which ones I want to be non-zero to achieve my desired (or undesired, I suppose) effect. I don't want a bus stop that already does this, as I want to be able to use and tweak my own now and in the future (though if there IS one on STEX already... I'd love to see it as a reference, I suppose). Any help, please oh please?

Or is this even possible in the first place?