i go with the majority here, make your own
before i started doing this i had very very little wood working exoerience,only in jr high school which was a loooong time ago.
i have made several bows,some from kits,some from staves( a piece from a log ),some have turned out wonderfully,others not so well. heck i even break them.
but there is nothing more fun than shooting a bow that you made your self,and not to mention that you gain skills to make yourself a new bow whenever you crave to have a new bow,thats gotta be the best part right there.
as far as tools go,minimal investment,and as some said you could even get some from free if you know people.
heck you can use a piece of glass or steel for a scraper,or a knife as a scraper,a rasp is nice but not completely neccassary.
remember our ancestors didnt have tool boxes full of tools,they used what nature gave them and what they had on hand.
nothing wrong with a kit bow,my first bow was a kit from RUDDERBOWS ARCHERY(they advertise here also),alot of jims kits come with a scraper and tiller stick to get you going.
good luck,you can do it
peace,
tim