Hi redhead and welome to the forum
So long as these payment do not affect your ability to continue with your IVA payments, then I can't see that there is any difference. You will be paying rent, as you are now, but this time to your daughter. I assume that your name is going on the mortgage due to income multiples.
You will need to check this out with your own IP, as I am just one of the forum experts, and others may well have different things to suggest to you.
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