Hi!
I can't think of any cheap bass type pedals for several reasons. i am a keyboard/guitar player and I use both KBs and GUitars to trigger my synths. Never had to use something as odd as a bunch of bass pedals with synths. Used them on a couple of home organs and so on but that's as far as my experience with pedals goes.

I mean I use a bunch of pedals but mostly for control and not playing.

If you are gonna get into synths (especially doing the Jupiter 8, PPG wave, DX 7, D50 etc classic Rush synth lines. I've played them to death. Hung out with guys from Rush at SBT Toronto from time to time. I know what you're after sound and playing wise). Honestly any good workstation of today (especially Yamaha MOtif ES) can do that kind of synth anthology stuff with no issues. I should say that any decent workstation can do good old Rush type sounds with no issues. Of coarse getting the original synths is always the best way but it's a pain in the ass to put it all together and price wise it's too much to put it mildly. Software synths are at advantage there since they cost little and sound fantastic but you have to take a laptop to gigs and therefore it's only up to those of us who want to bring their computers to every gig. SOme of us do that here but personally I haven't taken the use of software synths beyond studio environments. Live gigs and computers are not my style.
So anyway. Another thing to keep in mind that synth is not a bass or a guitar and has amplification rules of it's own. can't be amped with a guitar or bass amps. I surely run some of my synths through guitar amps and amp modelers but that's just for fun. Not for day to day use of synths. So what any synth of your choice will require is a mixer->stereo speakers kind of connection. At least a home Hi-Fi with loud enough speakers and decent RCA inputs.
So if you're gonna take synths to gigs you'll need to take care of a few things. Proper amplification being one of them.

I'd say get a Motif ES rack and expand it with a couple of An1X plug-in boards for better old school analog sounds (being digital AN1X models analog sounds. Not the same but sounds very close).

You'll have to spend on a KB, set of pedals (like the one you've mentioned) and a pair of speakers too. Logitech speakers get mentioned around here quite often because of the price and quality. Obviously real pro level speakers will cost a few thousand bucks but Logitechs seem to do the job for most KB players that do live gigs.

Okay. That's my $00.02 on it all for you.

-ED-

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A gentleman is one who never hurts anyone's feelings unintentionally.
- - - Oscar Wilde