My view is that your IP should put forward an offer of settlement based upon your instructions. We can guide, but should not act as judge and jury because that is not our place.
It is always difficult to advise clients, which are not clients of our firms, on the forum - as neither David or I have detailed knowledge of your case. Your IP does, and will be experienced in the needs and requirements of creditors, so it is really best to take advice directly from them - but if £5k was genuinely the best you could do, and you could no longer afford to make your IVA contributions, I personally would put the offer forward.
Regards, Melanie Giles, Insolvency Practitioner