My advise.......dont.
Get something less agricultural and more comfortable and quiet.
I cant stand them, just the lack of space between the driver and the door, never mind the lack of sound proofing, crap heating, expensive parts, rust issues, underpowered engines, no aircon or radio.
I could go on.
I have seen too many friends from the 4x4 club spend a fortune on them.....then sell them on a year later because they broke too often or generally hated them.
There are many more 4x4 out there that will do everything a Defender can, but in style and comfort and with half the price tag.