****** hell !!
I've done my A6 3.0tdi Quattro, used a mates garage for the ramp, took me an 1:10hrs to bring the car in, remove the cat and dpf, smash though one and cut open the other and remove the guts, re-weld the latter, refit and drive out
I then had the car remapped that evening using Sedox Performance software - this was stage 2 remap with dpf deleted and EGR deleted (generic no custom live mapped)
Let's say I rented the ramp for 1.5 hours (being generous), with the remap the whole lots cost me less than £300 all in !!
My car is going on the rollers next weekend, I'm expecting around 290/300 bhp and 440/450 lbs-ft
My econ is greatly improved
My drivability is hugely better
And I get ZERO visible smoke
Where ever you're getting your DPF delete done maybe qualify with them exactly the costs and a break down
My car being a 3.0 and a very similar size chassis to your B8 chassis the space to work is very similar
Just food for thought
Tom