Hi there - so sorry to hear of your current difficulties. Hope things will seem a little clearer for you soon.
You can definately split the IVA's up, but if your husband refuses to honour his share of the contributions - based upon your individual disposable income calculations - then yours may fail. Get your IP to provide you with a separated IVA calculation, which will show you the contributions you will need to continue to make to provide your own creditors with the dividend they agreed to. If most of the debt is in your husband's name, then your contributions could be quite low.
Was the property included in the IVA proposal - by either a final year revaluation and equity raise or additional contributions? If you are going to sell the property now it may be possible to retain some of the money to rehouse you and your son, but a variation meeting will probably be required to be called by your IP to gain creditor agreement to revised proposals.
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