Ok, a bit general but:
1] The mics will be your key choice. "stereo mics" (those with 2 capsules in one body) are generally not low budget unless you go with the Sony ECM series or similar. Church Audio can be a good choice, but they are separate microphones not a "stereo mic". Here is an example of a currently available budget stereo mic:
https://www.bhphotovideo.com/c/product/1183909-REG/rode_videomicro_compact_on_camera.html (i know zero about this mic).
Here is a "lowish-budget" one from one of the TS affiliated microphone builders:
http://naiant.com/studio-electronics-products/microphones/x-y-stereo-microphone-capsule-amplifier/If you e-mail Jon at naiant Dig around a bit, but I think most users here would recommend two microphones as opposed to a one point stereo.
1A} if you go new CA, check with Chris about shipping schedules; otherwise buy CA products used from the YS here.
1B} definitely learn the differences between using microphones with battery boxes or pip power (and/or phantom power), which for the Cassette deck will require some form of external power battery box to power the mics.
2]As long as the input connectors on each deck are the same (XLR or 1/4 inch or 1/8" mini) the mics can work on both decks. The PMD430 has 1/4" inputs I believe. Not sure of the zoom.
3] There is a great current thread about a compact stand-
http://taperssection.com/index.php?topic=185096.0;topicseen otherwise look for lighting stands which extend at least 7-10 feet.
4] Some mics will have cables with them. This is a personal choice of course. the analog deck will have RCA outputs/inputs as well as the 1'4 inch mic inputs. Grab a set of high quality RCA's.
One point leading to a possible discussion between you and some of us: Why Cassette? The main reason for asking (as a taper with a HUGE cassette master collection) is that blank tapes are getting very expensive as they are not being manufactured by any company in the world. I understand that "analog" is getting a lot of use or discussion amongst musicians and fans again, but the cassette medium is certainly more difficult to deal with if blank media is hard to come by.