How long does it take to get the U&O in Chester county PA?

[Nina Zou]

I'm interested in buying a foreclosure in Chester county, PA. Buyer needs to take care of the U&O.

Never did it before, how long does it take to get the U&O or does it depend on how many repairs needed?

Where shall I go to get it? 

Also the earnest money requested is very high. How can I make sure I can extend closing days if I cant get U&O within the 30 days of time period so that I won't lose the EMD?