How do you practice analyzing deals?

[Julia Fair]

I want to practice analyzing deals before I jump into anything. But is that possible to do without involving anyone else? Do you need to actually go to the house and have a contractor there to walk through and figure out rehab costs? 

I see people talking about going through 100 deals before finding the right 1 deal. I just don't see how that's feasible when you're trying to get a realtor AND  contractor there at the same time. Seems to me like they'd tell you to kick rocks after the first few.