I think it comes down to personal perference on how you want to do things. When I had 6000 sq ft of yard and one tree that pissed leaves every year, the electric weed whacker dropped in a plastic trash barrel and filled with leaves worked well. Turn the whacker on and it reduces the leaves by 80%. Pour the resulting mulch in the garden.
I then started actaully taking care of the property and dealing with the trimmings. A 5hp
chipper/shreader did wonders for reducing normal yard waste to cost effective volumes.
Then I moved to our current 1 acre property, half filled with avocado trees. I do have a half dozen trees that give offereings every year, but more importantly, I have tons, literally tons, of weeds, as well as trimmings. I did the research and came to the conclusion that ... ya know. I can haul a full truck load of stuff to the county yard every week for much longer than I will live for half the price of a
chipper big enough to do the job. Now I don't need to take a trip every week. Maybe every 2-3 weeks on average. Still, don't like keeping the truck occupied. So... I decided to buy a trailer. Fill it over time and haul it to the county yard. Of course, the best laid plans of mice and men are often afowled by women, so instead I bought a bigger truck that I fill and drive the car to work /forums/images/graemlins/smile.gif
Anyway, I am 99% of the opinion that there are those jobs that a 5-10 hp standalone
chipper/shreder handle and those jobs that require one of those monster 50-150 hp full tree chippers, and most of the stuff in between is not cost effective if you value labor at minimum wage.
Things may be different on your property, but my use can not justify the initial purchase as well as continued maintence of a large
chipper. Only you can decide how much material you produce that is "chippable" and how much you will need to deal with in its original form, and whether that justifies buying a piece of midrange equipment.
For me, it did not.