Based on the information you have shared, the best advice I can give you is as follows:
1) You are overstretching by paying €600 per month to your unsecured creditors. Based on your level of debt, you should look at reducing this to a more affordable amount. Base it over five years, and keep your commission separate as it's not guaranteed. Don't mention it eevn to your creditors as you cannot guarantee even a minimum amount This should be around €400 per month instead of €600. Ask to get interest and charges frozen. If your plan is affordable over 5 years to clear, MBNA for example will freeze charges and interest. You should get a similar result from some of the other creditors.
2) Go back to the full repayment on your mortgage. If you can get your friend to pay €300 per month, then this leaves you €1150 less the amount to your unsecured creditors. Your mortgage is your priority, and you should make more of an effort to pay this than the likes of your credit cards or overdrafts. Do this as soon as possible.
3) Pay your parents the €1000 in the credit union, and anything else you afford to pay from what you earn in commission over the coming months to get this paid off.
4) Once this is paid off, save what you can from your commission, and deal with one debt at a time, paying off the most expensive ones first.
5) Negotiate with the management company that you will pay this year's fees, and other fees for the coming years as normal, but you will contribute a monthly payment to them to clear the arrears.
6) You will need to complete a financial statement to show your position to your creditors, and send each of them a copy. Thsi will show that you have 2150 coming in(plus 300 from your lodger if necessary), and what you spend your money on. Keep it within reason, and do not include your repayments in this. This should show that you have around €400 per month left to live on, and your mortgage being repaid at €1300.
You are basing your repayment capacity over 5 years, but this is because your commission is left out of your income. As you accumulate savings, and pay off these debts with a lump sum (you may get a settlement offer as well for less, although this would be marked on your credit file). You should be able to clear your debts before 5 years are up, and this is based on teh assumption that most of your creditors will freeze charges.
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