While it might be tempting to look for a "crack" or a pirated version of to save on upfront costs, taking the "warez" route for tabletop RPG software usually ends up being more of a headache than it's worth.
Fantasy Grounds licenses and DLC often go on deep discount during Steam seasonal sales.
Let me know how I can help within those bounds.
While searching for a "crack" usually implies looking for a way to bypass licensing, the most "interesting" thing about Fantasy Grounds Unity (FGU)
The Fantasy Grounds community is famous for creating "Extensions" that add features the base software doesn't have. You can find these on the Fantasy Grounds Forge or the FG Forums.