heres a small shopping list for ya,
a 30cm bog standard cube nothing else. (£20) ebay.
an Interpet T5 Compact 24w Electronic Starter Unit(£17) Charter house aquatics.
an interpet T5 compact beauty lamp (£10)
A fluval 1+ (£12)
ive read in other posts you want a small nano planted?
well with use you will be getting 3 WPG which is sufficient for quite a few plants
and youll want a CO2 unit too! (DIY) i mean comon how much does a 2 litre bottle , yeast, sugar, water, airline and a diffuser cost? under £10