What RULES/LAWS should apply in this case. Please answer this only. Thank you.

This is Business Law

a Jack Russell & Terrier's Incorporated has a dilemma regarding several issues in business and home financial transaction. Jack Russell has began Terrier's Inc. a training and rehabilitation center. When he started the business he had to make several large equipment purchases. He was unable to pay cash for the equipment. Equipment R US allowed Jack to purchase the equipment on credit. ERUS took a security interest in the equipment. Jack also sells some equipment for home rehab. ERUS allowed Jack to take a floating loan on the equipment that was for sale. Jack also took an equity loan out on his home in order to finance his business. He has a monthly payment that is becoming more and more difficult to maintain. Jack has payments that he is making to his student loans, equity loan, medical bills, and spousal support. He is starting to feel like he cannot maintain his liability. He doesn't want to loose his home. He also doesn't want to loose his business. He needs advice. What are his option? What type of interest does ERUS have on Jack's equipment for sale