Congratulations on your install! I'm curious as to the "flatbed market".
I have one large client that regularly orders hundreds of boards from us and they all have different artworks, they strongly rejected the idea of direct to substrate as they reuse the boards. So they prefer us to apply low tac vinyl and rifoff / reuse.
We do get a lot of estate agent boards however the estate agent board market is so saturated that we actually screen print our large runs, works out much cheaper than large format.
I'm guessing this leaves signs and other large boards but here in the UK again you're looking at being competitive. Maybe as a company we just haven't found the right business yet.
That's not to say I'm not in envy, I'd love to have a flatbed in the workshop, nobody here likes applying vinyl!