I'd buy some weapons, kill a few pimps, steal their hoes, and pimp em out. Price tag is probably like 2000 for the weapons/grenades, the money is for a while!

On the other hand if you want non-insane, I would buy an appartment building, flip it, and try to make long term money on that. With partners of course.

Honestly for 25 grand I'd live off the money for a few months and find a job.