Ball joints

I was told that to change my ball joints on a 94 Yukon I needed a compressor or something to pop the balls into the socket, I was also told that I dont, but I would need to saw or drill out the old ones to replace them with new ones. Is this a job that I can do without any special tools and/or equipment? I really need them replaced but cannot afford the hundreds of dollars that the shops are asking for!
Please give me some suggestion, thank you.