Another option would be to use a USB display adapter. In the future, it might be possible to use a raspberrypi for this. For now, any supported DisplayLink adapter should do the trick. This is effectively a very low-cost USB graphics card.
The main issue with most of these options is that they rely on your computer booting on the removable media by default, which it might not. So you need to configure the BIOS, and usually need some video output for this. Some BIOSes will outright refuse booting, or pause the boot sequence if they can't find a video adapter.
Here, the BIOS won't recognize a USB adapter as a display either. Some can be configured with a serial port, but I am not sure how generalized this feature is.
Usually if a BIOS doesn't complain about booting headless, and it refuses to boot on external media, the safest option is to perform the installation to the harddisk using a separate machine, making sure that the ramdisk is the fallback image (as it contains more drivers and can thus accommodate for different hardware), and putting the disk back.