Wow, I cannot imagine how frustrated I would be in his case. Fortunately, you said it would still work in bulb mode, so I guess he still could take pictures.
If he is decided to go for a 2nd body, I would keep it in Pentax mount, for weight and space reduction. Better to carry 1 more body than body+lenses+chargers.
If it were me, I would buy a new K-5iis and keep the K-30 (if it recovers from the flu, as you said). I have the K-5ii and that is an awesome camera! I came from a K-30 and a previous K-x and now my sister's K-30 looks almost like child toy for me. I loved the K-30, but the K-5ii is in a higher level
Or, if he can afford a K-3, that would be even better. Just not sure if the price difference makes sense in his case.
PS: I did and still have a problem with my White K-x that only works in Manual and Video modes with lenses with Aperture ring (haven't tried Bulb mode). I used it for 1,5 year until I had the chance to buy a new body, which was a brand-new K-30. In the meanwhile, I got myself a bunch of old and vintage lenses with Aperture ring. I haven't fixed the camera yet (no spare parts...), but it is my 2nd body now, just in case.
---------- Post added 07-21-2014 at 03:19 PM ----------
Just one more point: the K-5 series uses a different battery from the K-30 (D-LI90, instead of the D-LI109). If this matters, the K-50 is selling for a great price right now!