Hi,
After working as a proofreader in a large video game company (publisher of Skyrim) for 3.5 years, I am now taking a break for a while, and have a lot of time on my hands, meaning I'd be available to work on your project extensively, for a quick turnaround.
The way I would usually work would be by starting with a quick read through of the play, to get a sense of the tone and context and to get familiar with the plot, which I usually find to be as important as correct grammar and spelling. Then I would perform the actual proofreading, making sure your text matches both the appropriate tone and context, and is of course in proper English.
Regarding your request for a pdf version, I assume you mean a fully edited version? With maybe a word document with all tracked changes?
If you have any questions, I'd be happy to answer them.
Have a good day,
Arthur