Does he get attendance allowance, certainly sound like he should and then followed by carers allowance for you, this could fund private carers who would help enormously with shopping cooking cleaning etc and personal care, he probably feels terrible that this is putting so much on you esp as he knows your needs first hand.
Definitely ask for home visits, you must cut out the stress to yourself and the idea of people coming to help by watching you cook is ludicrous, you need and deserve more help so you can at least enjoy your time without it being all about the hard practical things. I also think like others there are other probs with the leg as the healing of it seems to be going the wrong way