Ask yourself how long it would take you to feed it all through the
shredder.
I sold my shredder because although it did what it said - reduced
everything including small branches to a mulch - it took so long that it
wasn't worth the time spent.
Over time, a trailer might be a wiser investment.
A big trailer may be OTT but our 2 ton twin axle trailer (roughly 8' by 4'
bed) can shift an enormous amount of garden prunings per trip and
generally you don't even have to spend time chopping it down to fit in
bags which will fit in the boot.
Big branches go straight in.
Smaller stuff goes into the builders bags you get sand and stuff delivered
in.
It is quite satisfying to load up the recycling skip with loads of stuff
whilst other people are trailing up black bin bags from the back of hatch
backs.
Depends on how often you need to shift stuff, but a small Indispension
trailer which can sit on its' back and store with the tow hitch straight
up in the air doesn't take much space and can shift quite a bit - one that
takes the aforementioned builders' bags is about the right size.
Cheers
Dave R