Sweet deal for a dealer. $500+ for a 15K service, $700+ for a 30K service, another $700+ for the 45K service. So far Dealer would have gotten from you$2000+, not counting oil changes in-between. For $800 you can get decent tires that will last you 40K-50K miles.
You can do oil changes yourself for $10 using dino oil, for $20 with synthetic. 15K mile service is EASY and can be done in 1 hour and 2 beers for $100, including booze. Same goes for the 30K. At 45K you might want to get your tranny flushed (I do not believe in 100K miles transmission fluids), still less than $2000.
So do you want to pay $2000+ for a crappy set of tires?