There is no way I could possibly afford a roast every Sunday, even if we wanted to eat one as often.
But knowing that, doesn't help you - I was just surprised that meat prices must be a great deal lower in the UK, which I had not realised.
I still have a clear picture in my mind of a Giles cartoon from somewhere around 1970: a baron of beef in the butcher's window equipped with a sign reading, "Mortgages arranged."
Helpful suggestions:
1 If your dearly beloved husband wants apple sauce, he can make it himself, or at the very least, gather, peel and core the apples himself!
2 Actually, always assuming the man can read and understand a cookery book, I suggest he cooks the roast himself too, at least every other time you want one.
3 If the above is not practicable, set him to working out what cooking a roast and all its trimmings costs with the current electricity prices, (no pun intended) or gas prices. That should make him change his mind pdq!
4 Get yourself down to the nearest shop with a North African owner and buy a tagine, see photo. You can cook any kind of meat, fish or vegetables in it and it looks after itself entirely in the oven whilst doing so. And you can use the cheapest cuts of meat and the toughest chickens imaginable and they come out tasting and looking marvellous and are easy to chew, as well.