I realise that the price could be very much an issue, but as a modeller I look at the long term view that no investment in OEM manuals is a waste of time. The Heinkel has a lot of glass in the nose and as such the cockpit is in clear view (so to speak). the manuals included on the DVD also include close ups of equipment, cable routings etc which, in 1/32 scale can be seen in the cockpit. Also as there are equipment crossovers between aircraft equipment then there is double the value.
I appreciate that the cost of upgrading and detailing aircraft can spiral to the extortonate.... I am guilty of this on more than one level, especially with the Zoukei-Mura kits.
Revell of Germany has given us some smashing 1/32 kits with the 2 Heinkel variants and JU88 variants amongst others, but their price point also gives us the opportunity to either make a great looking kit out of the box, or with some expenditure a stunning highly detailed model.
Take a look here
www.hphmodels.cz/kat160.html
Now remember that the cockpit of the HE111 was not RLM 02 the actual cockpit interior was RLM 41 which to get the correct colour you should use Vallejo model colour 70986
Anything spent on research and intel is very rarely wasted and often comes around more than once!
Good luck with the build. I will be following it when you start
James