Do your stuff on desktop with software there.
Save file to SD card, run over to your FT5 printer
Insert SD card and print away.
You will run between desktop and printer 100,000 times for your first prints.
The FT-5 runs an Arduino Mega on controller so any touch screen that can hook up to that and be controlled by Marlin firmware on controller.
IMHO watching printer operate in software like Repetier
Perhaps a 100ft repeater USB cable between desktop and printer
and a IP cam at the printer
With teamviewer you can control and watch the printer fro a beach in the Caribbean?
Hey a laptop or desktop can be had for cheep now of days
but good exercise going back and forth to printer
$90 ---- probably more than a PC once you get it up and running?