Aluminium front and carbon rear wheel on hardtail? I recently got a used hardtail MTB. (Specialized Epic Elite) It's got Roval SL Control 29 - which is pricey. The front has 24 spokes and back has 28 spokes. Now I want to install a dynamo on it and found out there are not many dynamos for 24 spoke wheels. And I'm not sure If it's a good idea to use 24 spoke wheel on a long distance (I asked a separate question for this I stumbled upon a aluminium wheel with SONdynamo built into it Does using the Hunt wheel (aluminum) on front and carbon wheel on rear makes sense? Buying another Roval carbon 28 spoke wheel and building dynamo on it myself would cost me probably 2.5x the price. Should I stick with carbon on front as well at least even if it's not the same model?

You’ll be perfectly fine. A carbon rear wheel on a hardtail is actually a pretty good idea because of how much you’re smacking the back wheel around, thanks to the lack of suspension.