Well I wouldn't be putting it forward with that level of expenditure - £290 is ridiculous for three adults. I would have thought £350 to £400 is far more likely - but at the end of the day you should put down what you actually spend and not what someone says you should. Creditors are the ultimate judges at the end of the day.
If you choose an IP with a good reputation with creditors, and put an honest statement of fact in front of them, in my expreience your IVA will succeed. Those which do not succeed tend to be those where the IP has little or no contact directly with the client, where the IP is dictating what can and can't be spent, or where clients have clearly not been advised as to all of the options available to you.
Tread carefully! An IVA is a big commitment to make, but if prepared and proposed correctly, can be life chaning and absolutely worthwhile.
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