Would buy a duet to mainly use single?

[MummyTheresAfireBeeOnYourHead]

Dc 3 is due in midst of winter when I will be walking dd1 to school and dd2 ( will be 3.4 by then and nursery three morns). The walk is exposed, cold wind and about 20-25 mins each way max, a bit off roady. I anticipate dd2 will be tired with the newness of nursery etc still and relentless trekking to and fro, I will have various book bags, sports kit and lunch bags plus baby stuff ( various baby/toddler facilities within walk also) I want to walk A LOT, I have been ill but am now piling on the pounds....bmi surviving in acceptable ranges....just!!!
I have option to drive but last winter was often easier to walk with ice grabby shoe things on than faff defrosting the car. I reckon jan, feb, march good use of duet with carrycot for dc3 and seat option for dd2, then use as two seats for long day trips and lots kid luggage! Or with one seat plus the joey. Am I mad? I do rather love the look of the duet and quality etc and dd2 currently fits nicely when I tried in a shop....maybe different in 6mnths though. Am not averse to selling on after a few months use but maybe I should use a p and t and utilise the rear seat for extra storage and emergency seat if dd2 not coping with walk or ill etc. .....have had a p and t before and did love it but know is no use seat wise for my age gap really., can see it being handy later on as have big babies and need air tyres. Would you get the duet?

I wouldn't , I would get the tfk joggster twist with buddy seat and multi x carrycot

I wouldnt either. The Duet can pull badly to the side the bigger child is on. The quality really is not what MB's used to be. I agree with Parties - look at the TFK (but note no wheel guards so it depends how sensible your eldest is), and also the Mountain Buggy +One or a P&Ts or look at the new Micralite Twofold which would give you loads of options as your children grow up, including a luggage option!