Sensible Options?

[Condor]

I was made redundant in December and am currently doing long commutes wherever short-term contracts take me. I alternate using the S8 and the X5 for the commutes, both are V8s and although their fuel consumption is reasonable for the engine size and body weight (I get around 24 - 28ish mpg) part of me thinks I should look for a more frugal diesel commuting vehicle.

Just looking for ideas, sensible if possible I don't have to get rid of any of the cars, but am limited by lack of space - would have to park one up behind the others which isn't ideal as it would never get used and that and the moisture rising doesn't do the innards of standing vehicles much good, but I'm also not giving the S8 away for next to nothing and the BMW still has some finance owing (more than its worth I would think, given its a V8!)

Ideally, a cheap frugal luxury ride would fit the bill Seriously, though, what diesels should I look at? Budget up to £10K ish, it needs to be auto and have aircon. What about an AllRoad or a Merc estate or even a Skoda? Or even Jap stuff? Good ideas awaited........or should I just enjoy the two V8s and what the hell, drive them , as the price of diesel seems to continue to skyrocket and it may not be such a grand idea after all......