Ok, let's spin it the other way around.
His motoring expense at the moment is, say 420 per month plus fuel. He wants to reduce that as far as possible to fund a move closer to work which will make fuel costs minimal.
How does he achieve that?
By spending a grand on a Mk2 Mondeo.
Seriously, there is no half-way. He either keeps his £340 a month no faff no Hassle Volvo, or he goes super-cheap and spends £995 on a Mondeo.
Anything other than those two options simply doesnt save enough money to be worth the bother, especially if it requires borrowing to acheive.
And no, not a thrashed Mondeo ST either. A boring, normal, 1.8 or 2.0. If he's so tight on his finances that the £75 a month difference I highlighted is a big deal then he's stuff if the car needs any sort of expensive work, so no sports models with £90+ a corner tyres.
Mondeo on 15's. Job done.