Some good value for money companies of lift kit, cost around 2k-3k: OME (Old Man Emanuel), Ranchos, Rough Country, Bilstein,
Some slightly more expensive ones 3k - 5k: Ranchos advance, Terraflex, Tuff dog, King Springs.
Labour will depend where you take it: In Dubai it will cost 500 - 1000 dhs. In shj less than 500 for sure.
Fixing time: 2 hrs, if no custom bushing / spacers need to be made.
In case you are wondering, EAS is Electronic Air Suspension. One of the best feature of Range and also prone to problems as it needs good care after every 2-3 years. It lifts and lower ride height as per user instruction and also as per terrain.
Good choice already dear, supercharged are slightly more prone to issues than sport and HSE.
Just check if EAS is working fine and adjusting height properly and as fast as possible. If its slowly rising then and continue adjusting then there could be some minor to major bugs in EAS.
Check for no warning light on dashboard. Car drive well and stable above 100 km. Look for leaks under the car, minor leaks are acceptable but if something is really too much then i would advise to be careful and put hand after proper check from good workshop.
Remove both the cylinder head gasket, and the sump gasket in order to change the chain.
Remove the crankshaft pulley. I advise that you get this job done with a friend
good luck
A leak can be caused by many things depending on where it is leaking.
IF the head gasket leaks inside then it causes the coolant to burn in the cylinder head, which results in white smoke. So check if there is any coming out of the exhaust.
Hope this helped.