What happens if I buy a Joja membership?
Buying a Membership at JojaMart from Morris causes the Community center to be destroyed and replaced with a Joja Warehouse. After that, you can buy bundles from Joja mart via Joja Community Development Form.
If you are very rich (for example, using Cheat Engine for gold), this is the fastest way to unlock everything. However, don't do that, enjoy the game, enjoy the community center, enjoy doing quest to unlock thing. Just remember how our "main" get away from Joja for a peaceful life, a gift from her/his grandfather.