I don’t really think a month is even needed. Honestly, I think if they offered an hour long familiarization with the setup, people would fair significantly better.
Kinda annoying to spend $100+ to just play with the controls a bit before entering.
In my opinion, unless you really feel you did awful the first time around and would significantly benefit from buying the setup, I think your time may be better spent on other items.
On the other hand, $150 to secure your dream job (or at least make you feel better prepared) is probably worth it.