Sounds like a very capable motor, Mark. I wouldn't say £450 a month is cheap, but for what you're getting it's certainly good value. Enjoy 👍
Only cheaper if you go bangernomics and run something very old, but these days I don't have the time to maintain things and spend a weekend sorting out a car.
Even then, if you do big miles you'd struggle I think. Obviously don't know what your lease is, but for us, we pay £550 ish pcm to do 25k/yr (4yr lease). Running a banger we'd spend:
£343 per month in diesel (40mpg)
£20 per month for tax
£20 for servicing (2.5 regular services per year, plus belts, water pumps etc - this is a DIY price and I'm not convinced you wouldn't spend more when things wear out)
£45 for insurance (the galaxy currently costs £39, so added a bit as its only insured for 10k/yr)
£15 for tyres (assuming a full set every 40k at £70 a corner)
------
£443 just to run an old car
The only extra costs on the ev are electricity (2.3p/mile for me - excluding any freebies from work) =£49pcm to do 25k/yr.
So, over 4yrs and 100,000 miles the banger would have to be purchased and any problems/failures fixed for £156 per month. I'd say this was very unlikely to work out in favour of the banger, particularly as something in the £1-2k bracket probably wouldn't give you the 40mpg average you'd need to keep the fuel cost down and would probably need a big chunk spending on it to bring it up to snuff.
Even if it did *just* work out financially, you have to want to lie under the car, fix all the problems etc to save what amounts to a few quid a month, vs driving round in a brand new car with someone on the end of the phone to fix any issues for you.
This was exactly my thoughts, plus on this side it's a brand new car