I suggest reading the information carefully including the required inspection for occupancy before making repairs yourself.
Please make sure you get a home inspection. When interviewing inspectors, I always suggest to my customers that they have some type of construction experience. There are two websites for inspectors.
Missy is right. I just want to add, do it your self if you know how. I can not tell how many homes I show that the owner "did it themselves" and it shows! : ) therefore the house sits on the market. some people do a really good job, and some give a really good try!