Maybe offer a very cheap add on gpu for office use. Something in the igpu range that would sell for say 50usd. It could be based on one of AMDs older gpus but with support for new display types and ports.
Right now, the cheapest "new" video card sold directly by Newegg is a $35 NVidia 210 which was new in 2010. Interestingly, reviews from that time period suggest that it sold for $30 after rebate. It has HDMI, DVI and VGA ports.
In the $50 range you can get an R7 350, which promises 4K support (although I suspect that will be at 30Hz) and would certainly be enough to light a monitor with enough oomph to put shadows and transparency effects on your windows.
In the $50 range you can get an R7 350, which promises 4K support (although I suspect that will be at 30Hz) and would certainly be enough to light a monitor with enough oomph to put shadows and transparency effects on your windows.