Well then.......He's going to want the thickest strings he can possibly find. Try .115s if you can find a set.
Whoa, 30" scale, two full steps down?

He should get a five-string set and use the B string as the E string, etc., and throw away the G string. Might have to file the nut to make it fit the strings.

But if he doesn't do that, his strings will be hella floppy.
Computer programmers are loopy.
- That's one of my own!