Hi, i've had a look at the other thread you llinked, gosh poor you, you've got a lot to deal with at the moment.
It sounds like you are time poor as well as cash poor at the moment- when i'm like this things like stir fry recipes aren't ideal as although they 'only' take 20 mins and are cheapish its 20 mins when i get in shattered standing up in the kitchen, and i just haven't got the energy for it.
Have you thought about doing more roasts/ joints. Probably sounds daft but i do a couple a week and this generally means 1 day of cooking, 3 days of food with the need for very few new ingredients. this makes your weekly shop much cheaper, plus all the roasting time is not time i have to actually be in the kitchen.
Eg I do a boiled gammon / bacon- only £5ish from the supermarkets (£4 at lidl), shove it in a massive saucepan with cold water, an onion halved and a couple of peppercorns, and just bring to the boil and then let simmer for a couple of hours. Then about half an hour before the end i would throw in a complete bag of carrots, each chopped into three, maybe a swede chopped the same, lots and lots of new potatoes and anything else to hand. Half an hour later serve up with some of the broth and its amazingly delicious!
We would eat the same the next night, simply reheated. On the third day we would have either a bag of watercress chucked onto plates with the leftover gammon shredded, some tomatoes, beetroot etc and a nice chunk of bread, or a soup made by boiling an onion and some other veg including a potoato or two in the nice gammon cooking water (i don't bother browning the veg or anything, just chuck it all into the liquid) and then after half an hour blitzed with a hand blender and served with some nice bread.
Or i'll do a roast chicken, (again £5 ish or £4 from Lidl) just shoved in the oven with a massive amount of different roast veg added half an hour from the end (again if you use littleish new potatoes you don't have to bother with any of the preboiling nonsense, just shove em in) and served up for day 1 and reheated for day 2, when i would also shove the chicken carcass in a pan with cold watter and an onion and boil for an hour) . For day 3 i'd either do one of those flavoured couscous packets where you just add water to cook it (but i'd use some of chicken stock instead) with added salad stuff and leftover bits of chicken, or i'd do a soup using the stock i'd made, lots of veg and a tiny bit of chopped chicken as a garnish. Again soup just boiled up and blended, nothing fancy, but the stock makes it delicious.
So thats 6/7 days meals done with two meat joints and a bit of veg, plus very little hands on time.
I do similar sorts of things with a whole salmon if i can get one at a good price, pork joints, beef (again, when price is good) etc.
If you are interested, good books that seem to work along these lines of saving money by cooking one thing and using it over three days are the new english kitchen by rose prince, economy gastronomy by allegra mcevity and more veg less meat by rachel thample. Hope this helps