Hi la and welcome to the forum
A lump sum IVA is one of the options available to you, and using equity to be raised from your property sale ought to bring a speedy end to your debt problems. If you are going to be left with disposable income following the sale, however, be aware that creditors may well call for a five year contributions based IVA on top of the equity monies.
It seems reasonable for you to have two cars given your circumstances, so I do not see that will be a problem.
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