Winter rest without a greenhouse

[Skirril]

So I have 2 coelogynes (rochussenii and faccida) and a dendrobium primulinum which need winter rest I believe? When I got them I was under the impression that they only needed a slight drop in temp. and little water. So I was planning on moving them into the kitchen and leaving it at that (the den. is a young plant so won't flower anyway and the Coelogynes probably won't be flowering for a while).

Now I think this isn't the right thing to do, they also need bright light (which is difficult in the uk winter) and a fairly significant drop in temp which the kitchen won't get.

We don't have a greenhouse and as we are planning to move next year we won't get one right now.

I have been trying to think of things which might work, but the garage has no window and so is dark and outside wouldn't work in the UK of course.

What other options are there...? And what happens if I don't give them a rest? Like I said the Den is a young plant and the Coelogynes are newly purchased and probably a year or 2 off wanting to flower.