I have been using a Lambda exposing unit for the exact same purpose for two years now. I would be curious on the ease of operation and the quality level at various sizes of this device.
We chose the Lambda Unit as we make large murals and the quality is impecable .
I was quoted $50.00 Can 1/2 year ago on the unit you describe. So it looks like the price is indeed dropping.
As stated before on this forum , these units will drive the market for black and white fibre paper over the next few years.
I use traditional and digital exposing exactly the same way as far as contrast, density , dodge and burn, therefore a working printer can make the transition quite easily.
We use this lazer / digital system on all photographic materials, RA4, Ciba and Fibre.
A project that I will be working on in the next 6 months is to produce enlarged digital negatives, up to 30"x40' for various alternative workers that I have approached through this forum and my circle of friends here in Toronto. I believe this method will work brilliantly for making platinum , cyanotype, negatives. When working in these areas years ago I found the negative stage , difficult but not impossible to master.
I have been reading a bit about this technique with ink jet, but I think putting
Black and White film in the lambda will produce a better result. As stated I am not sure this will indeed be true but all my trials and error using materials with the devices we use point me in that direction.
These Mullerston/Deveere workstations and others will invigorate a sagging market and put in the right hands the benifits could be staggering for our craft.
Last note. I still shoot film and print traditionally.
I do not believe any of these devices will produce superior quality than a large format negative printed on ones desired media.
But for transforming medium format to larger scale these new methods blow the doors off trying to magnifying in the enlarger. ie trying to make a 30x30 cibachrome or fibre print from a 21/4 square trans/neg