Info on buying a motorcycle?

Hello,I am looking into buying a motorcycle and had a couple of questions.How long should the tires last? I read on the Buell Blast they only last about 3,000 miles is that normal for all tires or just that model.Is normal maintenance easy like oil changes? I am familiar with changing oil on cars and lawn tractors and would like to be able to perform this on my new bike.What is a good starter bike that is common so I could find a used one. I do not want a crotch rocket I was looking at the Honda Shadow, Yamaha V-Star custom and Harley Nightsterthanks