Freelanders cost peanuts to run in comparison - so I think you've made a sensible choice. But for a car that'll need to replace the Freelander and the MG ZTT as the family holiday car, plus do all the adventures I'd like to undertake, a D3 (or late D4 EU6 diesel) will be hard to beat
The Freelander's running costs are a lot less than a D3, which is why I went back to one, although a TD4 this time.
The actual fuel consumption difference between my V6 FL1 and D3 V8 is minimal, if restraint is used when driving both vehicles. The TDV6 is better on fuel than both the above engines, but obviously isn't going to be LEZ compliant.
I did find maintenance on the D3 was significantly more expensive than the FL1, especially in the suspension, steering and brake and driveline departments.
I found front pads last around 20K miles and rears not much more. Discs are all done after the second set of pads has worn out.
Front wishbone hydrobushes lasted just 15K miles on the first replacement after which I swapped them for poly bushes.
In the 2 years and 50K miles I had my TDV6 D3 for. It did need quite a lot of other work in the time I had it too, like replacing all the solid and flexy brake pipes, rebuilding the front diff, replacing the prop shaft, rebuilding all suspension control valves and the compressor too.
It was one of those vehicles that needed something done at fortnightly intervals. This didn't suit me at the time and not really needing the vehicle as much, I decided to sell it on.
If it was needed as a "do all" vehicle then I'd still have it, or bought a newer one with less miles.
Imo there're pretty difficult to better as a do everything, go anywhere vehicle for a family of 5 or more.