There are 2 things hammering your GFV and upping your monthly payments– your mileage (a 3 year old 75k miles car is worth £2700 less than a 3 year old 30k miles car), and your options.
Options are pretty much dead money down the line. Looking at yours:-
DSG = £1415 spent, retains £300 on your GFV (checked on my dads).
Discovery pro = £1700ish spent, retains about £250 on your GFV
Winter pack, park assist, keyless and metallic paint will retain £200 at most on your GFV for a £1370 spend (metallic/pearl paint enhanced mine by £40 vs Tornado Red).
So for your options (I include DSG as an option), you will lose £3735, which contributes approx. £114 a month to your payments.
If you consider that you’re getting no discount (should be looking for £3500 off a well specced model through a broker), a £3500 discount would amount to a £107 saving on your monthly payments.
Current undiscounted quote = £570pm
Broker discounted quote (with options) = £463pm
Current undiscounted quote (but forget the options) = £556
If you’re being priced out of a £570pm car you have a few options – chase a broker discount, do fewer miles (maybe buy a reliable older car for racking up the heavy/business miles) or lose the options.
If you are doing 75k miles in 3 years you need to be aware of the limitations of the standard guarantee – it is only good for 60k miles, any more than that and you’re on your own/reliant on VW goodwill if something should happen. You could get the extended 5 year/90k miles warranty, but at your mileage you won’t even see 4 years out of it.