Cracked version is always risky to use since they required to turn off your AV when you install the cracked software because it’s detected as malware while you can’t verify what’s the exact content of the cracked version you download.
Availing the trial version for 30 is the best way if he will just use it for temporary use only or find someone in the forum who can sell a licensed with discounted price if he wants to use it long term.
It’s very risky to suggest a cracked version mate due to the potential malware.
Not always, I have Solid works running fine and as far as I remember I didn't need to switch of the AV at the time of installation.