Disco PTO Install

Hi everybody
I'm looking for advice and here.
I own an auto 02 Discovery TD5, I use it purely for work towing a heavy trailer every day.
I also have a lovely little skip trailer that uses a 12v hydraulic pump, the pump sometimes struggles and kills batteries often, so I've been thinking it might be possible to fit a small hydraulic oil tank in the boot of the disco and a pto to the transfer box to run a pump.
I'm hoping this would allow me to use a more powerful pump on quick hitch hoses and reduce the trailer weight considerably.
Can any of you landy experts tell me if this would work and how to go about it? Any advice would be really appreciated.
John

wouldnt it be easier to power pump from truck electrics

Thanks for your suggestion.
You may be right in what you say with a power pump, I'm not very mechanically minded and know less about hydraulics, I'm only coming up with this idea from my experience driving tipper lorries in the past, they all use pro powered pumps and produce a serious amount of hydraulic power.
Do you have any suggestions of a power pump that I could look at?

what he meant was powering the 12v pump from the vehicles electrics using longer leads and a anderson connector set up It would be considerably cheaper than fitting a pto pump etc .