beavis is running off me littel 3kva genny atm.
tbh petrol gennys don't cost much 2nd hand you can normaly get somethign for £50 at auction thats got a honda motor it'll look rough but go forever.
the littel 650w or 800w 2 stroke gennys are crap i have quite a few here used to use them for running the odd few lights at entarances to events but we gave up with them, they can be had for less than £50 new biut have a very short usefull life and they arn't reliable and smell only bounus is it dosnet matter if they get nicked.
small petrol gennys cost you about 33p per kwh (in fuel). they run on about £1ph flat out on low load they'll run on about 50p ph
diesel genny cost you about 14p per kwh ( in fuel )