You can take your bank savings and put them off the loan(s). That would reduce your current outgoings slightly,...
Taking some of the share balance off the loan balance will have the same effect as above - slightly less repaid each month due to a reduction in interest due!
I don't think that there is anything "slightly" about this.
Your current position is something like this
||Interest rate|interest|
Loans |33000|9%|-3,000
CU Shares| 16000|1%|160
Bank Savings|10000|2%|200
net borrowing|7,000||2,640
Net APR||38%|
...
|net |loan|shares
You|10,000|19,000|9,000
Wife|7.000|14,000|7,000
Step 1 - Check out
this thread to understand the wonderful world of how Credit Unions treat their members
Step 2- Check out the intererst rate each credit union is charging you on your loan and paying you on your shares
Step 3 -Check out their policies
Step 4 - If a Credit Union charges interest on the net amount, then leave it for the moment.
Step 5 - Assuming that neither does that, then reduce the loan outstanding by as much as possible by setting the shares against this.
Warning: You may meet resistance from the CU to doing this. They want you to borrow money at 9% to place it on deposit at 1%. This is in their interest, but not yours.
Step 6 As an absolute minimum, request that your shares be paid off your loan so as to reduce the loan to 4 times the shares
If they set €5,500 of your shares against your loan, this would reduce it to
loan|13,500
Shares|3,500
Net loan|10,000
shares/loan|26%
They could set your entire shares in full to reduce your loan to €10,000 but probably won't. Ask them anyway.
Step 7 - Ask if you pay off your loan in full, will they give you a fresh loan of €7,000 without any shares.
Step 8 - If they agree, then pay off your wife's loan with the fresh loan.
Your net position will be a loan of €7,000 from your credit union on which you will be paying 9% interest.
At repayments of €500 a month, this would be cleared in around 14 months and you would be debt free.
Net result: You + €2,640 per year ; Credit Union - €2,640 per year
I think that this is worth aiming for.