Financial Challenges Support Group
This community is for people who are struggling to meet financial obligations of any kind. Financial challenges include everything from the day-to-day challenges of making ends meet to managing credit card debt to bankruptcy. Get support from others who are going through similar obstacles on the road back to financial stability.
Talk to the finance company, explain your situation and work out a payment plan at the absolute minimum. They will probably accept as little as $20 a month if you make those payments regularly. The main thing is to keep emotion out of it. They really don't give a shit what your situation is, they just want their money. When you talk to them, you should tell them that you cannot afford the interest and penalities, and lock them into a set amount.
They have already dropped the amount due by 50%, so I think you should take it. They sound like they are trying to help.
But remember, keep your emotions out of it. Not easy I know, the hardest thing in the world for me to keep my emotions out of is money.
Good luck, and PLEASE, don't co-sign every again.