vinegar that really doesnt seem do-able I hope things get better for you soon ..
However instead of vits (which are expensive and you pee them out much quicker than those found in real food) ...
Couldnt you make veggie soup? buy carrots, onions (loose ones are cheaper) and red lentils (a coupl e of sticks of celery and a clove of garlic in is also good if you can afford it ) Get cheap stock cubes from morrissons or lidl , and some ground cumin and coriander and blackpepper to add..
If like me you have an 'easyweigh' shop you can get spices cheaply in small quantities (lentils also) ..
Add some shredded greens also at the end, and tin of tomatoes if you can afford it . Also dont forget if you can access to some garden herbs ,, a bay leaf or some rosemary or thyme makes all the difference
cook the lentils with the onion and carrots before adding in tomatoes or salt , otherwise they wont soften properly
will make a huge pot . and keeps all week in the fridge .. Much cheaper than cup a soup and pleany of mins and vits ..