what has gone wrong so you can fix the right part. Most people give up, which is why resale value tanks. Dollar per dollar, I put way more money into my Toyota Land Cruiser than both my Land Rovers combined. Exponentially more $$.
So, if you are a DIYer, Land Rover ownership can be quite rewarding as they incredibly capable and comfortable.
I've also owned and been around a number of different Jeep models over the years from a CJ7 up to the new JL Wrangler. Jeep "unreliability" is also blown out of proportion. Most jeeps fail because people are driving them hard and outside their performance envelope (particularly off road). Mods on anything decrease reliability, and Jeeps are one of the most modded platforms out there (especially the Wrangler).
Out of all the Jeeps I've had experience with, I can only think of a cousin's 1st Generation (KJ) Liberty that had what I would call an early major/mechanical failure (a known issue with the non-Pentastar 3.7L V6). One cousin still has his 1978 CJ7 and wheels it routinely in the Colorado mountains.
The Jeep will be cheaper in the long run than the Range Rover. A Toyota will outlast either, but you will pay for it.