Intonation is a pet peeve and I will try to get it to be exact at the 12th. Now most of this is folly, because the tuner at best is probably +/- .5 cents (at least advertised) and I know that when I play I am not fretting perfectly especially at or above the 12th fret.
As for inexpensive ukuleles, I would think that you should be able to get within +/- 5 cents at the 12th doing a static test. This is also providing that the saddle can be compensated within its width.
There are other things that come into play when a ukulele is good at the 12 and off at the 3rd. Since we are talking about Kala, my wife has a nice cedar/Koa Kala concert from 5 or 6 years ago. the intonation was pretty good at the 12th, but for some reason when playing a G on the second string the G 4th string at the same time, they were off. For a while it drove me nuts. I worked on the nut slots and changed strings and things got better.
John