I did mine myself, but it all depends how confident you are in your own ability.
I found it very straightforward, however other people prefer to have a company install the system for them. It is important to have the water tank 100% secure because of the weight you are carrying.
I've got the pump and flow controller in a pump box with a leisure battery which keeps everything nice and neat. So theres nothing complicated about it.
Once everything is in place its just a matter of making your hose connections, water tank to pump, pump to DI vessel and then DI vessel to the microbore hose reel which feeds your pole.