it is a nice little printer for doing some low quantity transfer and decal/label runs. If that's all you will be doing, great machine. The machine is perfect for the screen printer/emboidery shop to bridge the gap between the onsie twosie jobs and the 24 and up piece.
The biggest disadvantage of this unit is there is no room to grow. the size is very limiting...not for the sign maker at all. I mean you can print on banner material etc., but not a demand for it.
Since you are on a sign forum, my guess is you want to produce signs, etc...you will be unhappy due to its size.
I had the same thoughts. As long as you know the limitations and it fits you business model for the next 3 years go for it.
My experiences:
At the first company I worked at I was part of the printer buying process. The owners wanted to take the safe route and by a 30" printer. I kept pointing out how many banners and site signs we did that were larger than 30" and the impact of having to tile jobs (labor, alignment, waste). Vehicle wraps would have been a nightmare. We bought a 54" printer and in hind sight the owners were glad they did.
They say the BN-20 will print 18.9" wide on 20" media but more realistically it will print 18.5". If you plan on doing print, laminate, cut you will loose another 1" for the registration marks leaving 17.5" max.
You need to laminate the prints if you want them to last. The new inks have more scratch resistance but chemicals and abrasion will still take their toll over time. Extra investment for a laminator or hand laminate.
It's hard to be profitable with small orders of small decals and with this size you've set yourself up for this market. You have the same amount of setup time for a few square feet and it is hard to charge accordingly. Customers seem to balk at the high cost and there seems to be a higher percentage of tire kickers in this market as well. One way around it is to figure out a minimum price to run the printer. If they ask for 5 3x6 decals, let them know your minimum is $65 but you will produce 10 for that minimum.
It will be harder to compete on larger orders because it's slow and you will be paying a premium for your vinyl. Roland's 20" cast vinyl is $.20 more per sqft than their 30" media. Can you source print media in 20" elsewhere? At what cost?
I would talk with people who have Gerber Edge's because they will have more experience with this market segment.
There's a niche for this machine, just make sure it fits yours.