Cordless/petrol hedge trimmer/strimmer (Or Broken generator) (Pokesdown BH7)

Hi, I'm looking for a servicable cordless hedge trimmer and/or strimmer to tidy up the alleyway by where I live.
( It has to be cordless/petrol as the hedges/bushes/trees are over 150 yards from any power source.)

A generator would solve everything, but they never seem to be broken,.. (do they?)

I'm pretty mechanically minded, so even if it doesn't work I should be able to repair it!

Who knows, it might even help me to start up a business of some sort? (Clearing gardens/repairing garden machinery etc!)

Ta muchly, Reg