I think you need to really consider what your hopes for the future are, with regards the house, job, etc BEFORE deciding on either IVA or bankruptcy.
I was made bankrupt last week. My car is on a “pcp” scheme like yours and so now I am just waiting for the day when they come and take it!
We did not have any equity in our house, it was in negative equity, we could not sell it so had no choice but to walk away and leave it to be repossessed. Yes, we started off by looking into an IVA and had a proposal drawn up, but the payments rose to over
£800 per month, we could not afford that.
We had already “lost” our house so decided bankruptcy was the way forward, a fresh start!
I think an IVA is good if you are committed to paying off your debts (it sounds awful, but I am soo sick of struggling, I could not bear the thought of another 6 years of struggling!) or you want to save your house or a job.