Have you got transport ? Have a look on e bay for food grade plastic buckets or hdpe barrels etc , the main cost of them is the shipping so if you can find one nearby you could go pick up . Its that or go round to restuarants and ask if they have any empty containers that foodstuffs came in - avoid oils and strong flavours though . Farmers have a fair bit of stuff supplied in foodgrade buckets of 10L and up , often with lids . Plastic jerricans of any size are good and cheap , you can cut away the top to make a bigger hole . Asda have a 40L black bin for £4 that you could put a white plastic bag , a poly bin liner into . Big hardware/homeware places have 25L white plastic "nappy buckets" that have a handle and a lid . There are plenty of cheap plastic storage crates around , many with the foodgrade knife and fork logo on for less than a fiver . On the whole try to go for polyprop with the triangle recycling stamp with a "5" in white (if in doubt), or a "2" on the blue hdpe . Many fine brews have been made in dustbins with a polythene bag as a liner !
Think laterally ! Its all out there but not necessarily labelled as "homebrewing equipment" !
Tell us how you get on and good luck mate !