Upgrading Suspension

Don't know much specific to your vehicle, but I would think that a good set of new springs and shocks would be all there is to do for a two inch lift. Should be pretty straight forward, with most aftermarket guys having something available for you.

As far as your dual batt system, I did mine myself recently, buying the components from various places and saved a packet on a drive, drive out scenario.
Good deep cycle = @$120, Redarc isolator = @ $120, cradle = @ $100, hella plug and cables etc = @ $60.00. Took about an hour to do the whole lot.
ARB quote was about 850ish, so about double!

Good luck with it, and don't be afraid to try to do this stuff yourself, including your suspension install labour.

Dual battery set-up...Battery $130(Desert King 17 plater).....cradle $0(used scrap metal)....Rotronics Battery Isolator $250....wiring $10...did it myself...works well.
Depends how handy you are... Around $400...depends on the battery you are buying. I used the Desert King for my main battery and stuck my 4 year old Century/Yuasa Overlander 17 plater in as the auxilliary(it is now 5 yo and still going strong).

Luckily my bog standard G60 doesn't require a lift...it is high enough off the ground.

Cheers,
Willem

Always going somewhere