450L
We only use Td5 (1999 - 2006) Land Rovers as these are the best. You can get them for anywhere between £2500 for a rust bucket to £10,000 for a cracker. Ex Hydro board 110s are a good option as they are Land Rover factory 'Special Vehicles' and come with beefed up suspension and side lockers, they tend to have high mileage but are well maintained.
We have bought MOT failures that needed loads of work to get them up to scratch and we have bought low mileage / well looked after Landys too. Depending on the state / type of the vehicle it can take us between 2 weeks and 2 months get the Landy stripped out and the system installed.
It is difficult to put a price tag on them as the vehicle that you start with will determine the labour needed and therefore the price, Defender 110s come in many different variations, truck cabs, hard tops, Special Vehicles etc, and are often modified. I could probably source and build you a good one for £10,000. I could definitely source and build you an excellent one for £15,000. The thing to remember is that correctly maintained Defenders will easily outlast a van 2 or 3 times over.
The Landys are 2 man double DI set up, element heated and would come with a full 1 year MOT, WaxOyl rust proofing on the chassis, full re-spray any colour, brand new wheels and tyres (the tyres we fit are high weight rated) and would be newly serviced (all fluids, filters and belts replaced). We can also do any customisation that you might require.