Just thinking aloud and in no particular order:
1) if your friend needs those boards within a reasonable time (say less than 2 Months) then he´d better find another source, *you* will need some time to "catch it" specially if unexperienced, and every package has some "learning curve" ; some longer, some shorter but all take time and practice.
2) if your friend "
used to tape his own designs" then *he* has experience, even if outdated.
Way back then steps were:
*
very rough "back of a napkin" pre-design
* rough design
* iterative drawing-erasing-redrawing until he solves the main PCB problem: connectivity.
* iterative redrawing until parts are where he wants and design is relatively compact.
* taping on Mylar to get the final artwork
* burning/printing/etching PCB
Ok, the first 4 are the same today, only he draws and edits on a PC screen.
He´ll have to learn a few commands but basic mindset and skill is already there
And the first rough design on paper is useful/needed even today.
Using the PCB software *only* as a "direct PCB drawing board", without previous schematic drawing or netlist generation may seem crude, but works for relatively simple jobs and certainly saves a lot of steps.
Which can be learnt later.