Photo resist method times:
5 seconds for printing the positive or negative on a transparency using a inkjet printer.
3 minutes for exposing one side to a pre-sensitized PCB using a sun lamp.
3 minutes for developing in a weak solution of Oxiclean and water.
10 minutes etching in Ferric Chloride solution can be reconstituted with H202.
3 minutes stripping in a weak solution of Draino or a strong solution of Oxiclean.
30 seconds in tin plating solution.
Less than 1/2 hour total, what can be simpler?
You "can even use PTT components".
Result, a great quality PCB that will last for years.
I have used pre-sensitized PCBs that are more than 10 years old and can still be used effectively.
Edit there is this:https://www.kickstarter.com/projects/1597902824/agic-print-printing-circuit-boards-with-home-print