No expensive equipment or lage disk space is required for this kind of stuff.
The attached sample was made with
Synth1 inside
OpenMPT. You probably have enough free disk space for both of those.
Part of the attachment is also a preset file containing the Synth1 patch, which can be loaded back into OpenMPT or any other VST host supporting FXP preset files.
Last but not least, I converted the sample to 8-bit mono for comparison. Before conversion I set the sample volume to 25% to emulate the distortion of the original sample, again just to make comparison easier. It doesn't sound quite identical, but this experiment is just to show that with a little bit of tinkering you can already get very close.
The sample actually sounds a bit like an FM synth, so Synth1 might not be the best candidate for emulating it. Given the sample description, one could assume that it might be sampled from an ARP Instruments synthesizer (of which none are FM sythesizers but they are indeed all analog), but without more details where the sample came from, that's just a wild guess of course. If the sample is indeed from an ARP synth, recreating it on the original synthesizer is definitely going to be an expensive ordeal
