Risk insight: Joint-and-several, unlimited, defense-waived personal guaranties are extremely lender-favorable. Negotiate caps, several (not joint) liability, a requirement that the lender exhaust collateral first, and a burn-down as principal is repaid.
Safer rewrite: Limit each guarantor's liability to a stated percentage/amount (several, not joint), require the Lender to first realize on the collateral, preserve customary suretyship defenses, and reduce the guaranty as the principal balance is repaid.
Law ref: Restatement (Third) of Suretyship & Guaranty §§48–49
Worst case: After default, the lender pursues the single guarantor with the most personal assets for the entire balance, bypassing the collateral and the other principals.