When you make the deal on the bike, I suggest you try to buy enough parts to maintain the bike for a year or so and buy them at dealer cost. I've found most dealers will go for it. "I'll take the bike, but I'd like you to sell me a one time parts order at your cost". Get a W.P. seal kit, oil filters, one air filter, maybe even a fuel filter kit, tires, more tires, tubes. I ordered a pair of hubs, disk brakes, and built up a set of 19/17" wheels.
Riding two up, get a custom seat and some type of back rest for the passenger, like a trunk. Goes a long way for comfort. Also, the 19/17 wheels work great on the street.
"Dad, can I get a motorcycle when I grow up?"
"Son, you can't do both"