You can also sell pre-loaded SD cards so people can plug them into RPis. If you want maximum distribution, creating a simple image that can be downloaded and put on an SD card is trivial. Especially since debian armhf natively supports RPI Bs. Just install debian armhf on a RPI B, build bitshares, set up ssh, make some systemd services to start/restart bitshares - and then wrap up that image for distribution. Someone downloads the image, copies it to their SD - sticks it in, and it's a headless, stand-alone server that starts once you plug it in.
BONUS: the RPI B image will probably work with many others boards with no changes, including cubie board, some of those omex (sp?) boards, etc.