Sofabed (IP16)

In desperate need of a good, solid double or king size sofa bed that can be used longterm, not just for the odd weekend...my husband has mobility issues which have got so bad that he is unable to walk up and down stairs any more, so until we can get a move to a more appropriate place to live we have been sleeping on a mattress on the floor in our living room, which is far from ideal, as we then have the issue of him needing my assistance to get up from it in the morning. A strong sofa bed would really help us, but because we are on benefits as I am his sole carer we don't have the money to buy one...I already have posts up for a fridge freezer as we are in desperate need of a large one due to ours turning into an iceberg, so that's two essential items we need right now, and I'm most likely going to need to ask for a cooker too as ours is so old it's starting to rust everywhere and only one half of the hob works...lol...anyway, forget that, this post is supposed to be just a double/king size sofa bed...!! Thanks in advance if anyone can help