The only thing I clip on a regular basis is bridle paths. Mine all have long manes and it just makes life a little easier.
Show clipping is a bit more in depth. I do legs about a week out fairly short, less work right before. Ears, muzzle, cleaning up jaws/throatlatch, eyes I do the day before.
I have used Oster Golden A5's for the last 20 years and love them. You can pick up the older styles relatively cheap used and then put the money into new blades. I keep several sets of 10/15/30/45 blades. Keeping blades clean & oiled after every use will help extend the life between sharpenings. Kool Lube to spray during clipping, keeps blades from getting warm and it smells really good ;)
Life is like a camera. Focus on what's important, Capture the good times, Develop from the negatives and if things don't work out, Take another shot.