The 5ply-All type blades are all cheap, there's no bunch of money involved.
However I would definitely not recommend getting a pre-made bat. Those are shit and don't last at all. They're also grossly expensive for what you get.
For nearly nothing, you can get a great custom beginner bat, getting some ALL-type wood blade and a couple of beginner rubbers, and that shit will be much better and last much longer.
Try to make sure it's an all Limba blade or Limba+Ayous. that would be safest.
Get something light, something intuitive middle of the road. (not stuff like Yasaka Sweden Extra, for example, which has one of the harder woods for a top ply, harder than koto even, which is rare and idiosyncratic).
And a couple of Yasaka Mark5 rubbers. Probably the best quality starter rubbers you can find. Sriver is similar but more expensive and I think less good.
I dunno what you mean by 'worn rubbers' but...... er... yeah. Starting out with worn rubbers can really harm his learning process.
Although it can be fun. There was a guy who came to our club who had the weirdest shots but made one of the good players tear his hair out and later we figured that his rubber was 'worn'. Some parts of it held the ball, some didn't, so the good player could never figure out what kind of ball he was getting back. It was funny. They both kept making silly errors and turns out that was the cause.