Personally I'd buy quality cutting tools from the start. Sure, you're going to break some, I managed to badger a centre drill recently on what should have been a simple hole in hot rolled steel. The centre drill may well have broken because it was a no name, el cheapo, one bought years ago when I didn't know any better. On balance I think that the extra cost of quality cutting tools far outweighs the frustration caused by using cheap cutting tools. It's only too easy to blame oneself for poor machining when starting out, when the problem is in fact a poor quality cutting tool.
Regards,
Andrew
PS: I think there was a thread a while back by 'Wolfie' regarding poor finish when milling; all sorts of involved suggestions as to cause were propounded, if I recall correctly the problem was simply caused by the use a cheap end mill which was poorly ground.