Advise on misting system

As mentioned in another thread, I want to sell plants. It seems that a misting system is a must for cuttings. As I am not very technical, I would like to purchase a kit. What do you think of this system?
I saw some greenhouse structures on the net and most were plastic over some structure. How do you care for the plants if there is plastic on the top? And if you have a mister, you need the plastic (I don't want to use a lot of water though).
I have some old laserlite roofing sheets (these plastic corrugated sheets) are they suitable, and do they let enough light through?

I use this mister at the peak of my greenhouse for extremely hot days. The brass mister heads are available sepereately and you could custom make a misting system that would fit your bed exactly. If it were me I think I would look at that rather than the ready made set up.

Thanks for the advise. Hmm now it's getting complicated. From the tap I would need a simple timer (which one? - simple and reliable).
then a pipe or a garden hose or a black polypipe. Then a pipe which goes into the propagation box (not a greenhouse) and then I would need a misting outlet every ??
You recommend a brass mister are these better than the plastic ones?

Plastic misters should work just fine. I like the brass ones because every so often I have to clean an orifice of sand from our well water. I just made the leap and assumed the brass would be more robust and haven't used plastic. Your mention of saving water, by making your own it would allow you to look at the spray pattern of whatever style you selected and place them accordingly in the propogation box. I've had good results with capillary mats for honeyberry, blueberry and currant cuttings.

However I don't really understand why a kit should be that bad. I could put it together and have a base were I try something out, if it does not work I still can adjust. it. The brand is "holman" no idea weather this is a good timer or not.