Although idling for 2 minutes is a necessary evil to cool down the turbo and provent oil coking of the turbo bearings, idling all other times is BAD for a diesel and not something I recommend.
Turbo seals need boost to keep them sealed. Excessive idling will cause increased oil into the air intake and possible wear on the turbo seals.
At idle, fuel is not efficiently burned and you can get a significant washdown of oil coating the cylinder walls from the unburnt diesel fuel. You'll also see increased fuel dilution as a result....more frequent oil changes needed.
Wetstacking? Not sure if this would be an issue but I've seen older diesels damaged/hurt from not having a sufficient load on the engine, i.e. idling.
The CRD heats up very quickly. But if you need heat prior to driving your best bet is a fuel powered pre-heater
An ESPAR heater would suit you perfectly.
http://www.lubricationspecialist.com/index.php?
cPath=8&html=espar.htm&osCsid=7c156e5f753388926de14be5e649ac02
Websato may also have a heater that can be modified to work.
Oh, I run 80mph within 2 minutes of starting my CRD in the winter. My only oil analysis 7500 OCI, showed no unfavorable wear. I just take it easy and don't accelerate fast when engine is cold...let auto tranny shift at 2200-2300 rpm.