Other Secured Loans — Tinker Federal Credit Union is a personal loan from Tinker Federal Credit Union. Typical credit limit: Other Secured Loans on items above are available up to $35,000 for qualified members. Hot tubs/spas/pools/swim spas are available up to $50,000 and horse trailers (with or without living quarters) up to $75,000.. Loan terms: terms up to 120 months.