Hi stevep and welcome to the forum
You have effectively preferred your brother and father over your other debts, and under insolvency law this is not permitted. If you were to be made bankrupt, the Trustee would have the ability to recover those monies from your brother and father, and distribute them evenly across all creditors.
How much was your house sold for and what equity was released? If you are able to recover the monies paid to your relatives, then an IVA may be possible, without this then I think your case is doubtful.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk