my local market had 3 "one size fits all" nighties for £5. they had various lengths and some button front. i held 1 against me and the sides were halfway round my back. and i've just gone to a size 18 clothes.
i dont like tight nighties at the best of times cos i "fidget in sleep" and get tangled in them. b4 this baby i was a 14/16 but most my nighties were an 18 for above reason. i dont care as long as comfy.
i have just got 2 plus size nighties off ebay in pp were £4.79. not going to moan if i chuck em afterwards.
as for bottles and formula - my hosp have a vending fridge of the pre-made 1s, its £1 for 2 bottles and 2 teats. that is the only way they agree to formula, can work out very dear if you in for long time. i got OH and family to bring me a bottle in made when they came to save a few quid.