Manual Disco?
http://www.autotrader.co.uk/classified/advert/2012...Land Rover Discovery 4 2.7 TDV6 Commercial 5dr 2010
5 Doors, Manual, 4x4, Diesel, 17,969 miles, White, Cloth, Ebony Black, Air suspension, Air-conditioning, Bi-xenon headlights, Convenience pack, Cruise control, Driver & passenger airbags, Dynamic Stability Control (DSC), Electric heated door mirrors, Electric windows, Electronic Brake Assist (EBA), Electronic parking brake, Electronic Traction Control (ETC), Gradient Release Control (GRC), Heated seats, Hill Descent Control (HDC), Permanent four-wheel drive, Power-assisted steering, Powerfold exterior mirrors, Privacy glass, Single CD player, Trailer Stability Assist (TSA), Volumetric protection (alarm), Full-colour navigation with touch screen, High mounted rear stop lamp, iPod link lead, Roll Stability Control (RSC), Front/rear split differentials. £21,995 + VAT

this is the perfect choice brilliant cars and sorted reliability wise now.
I wouldn't not worry to much about autos for towing and off road especially if he is in any way considering a disco as their auto boxes are very very strong.