Hiya I work at a translation agency in the UK so I can provide some insight into costings in the UK.
Generally if you work with a translator directly (who is fully qualified) , and have a script prepared, the pricing would be between ÂŁ30-90/1000 words.
Proofreading, from my experience varies between ÂŁ15-40/1000 words.
Editing can cost between ÂŁ20-50/1000 words (or if you work on an hourly basis ÂŁ20-50/hr)
You could likely find cheaper rates depending on your country and deals you make but these are the kind of rates I tend to work with.