hi,
ya know.....i have to say that thee whole "licensed, bonded, insured" thing is kind of a "loaded" terminology. i've been a self-employed landscaper for 20 years. i am licensed, but never have been or will be bonded or insured.
i am a small 1-3 person operation & never bite off more than i can chew---granted, that's not to say some folks do! my clients are some of the best people in the world & i wouldn't have gotten them if i was all of thee above! i got them all through "word of mouth".
sure, if you have a large job that requires construction that there's the possibility of people getting hurt----get someone licensed & bonded. but, if your just revamping your garden (which is what most people do) get some smaller local gardener. i'm sure they would appreciate the work as will you in the long run! i know plenty of good gardeners in west seattle that have some years of experience under their belts.
and the other, most important thing----get 3 estimates!!! most folks give them for free and if they don't, you DON"T want them! i have a middle eastern rockery fella i have worked with for about 10 years now. he's on the east side, but works everywhere. i guarantee he will outbid your previous estimate. granted, he's not as meticulous as some, but i definitely think you get your money's worth. check with some local gardeners & if they can't beat that price, get someone like this fella then get the gardeners to do the "plant" stuff!
good luck!