Machines in general, sure we can make. Magitek machines, not really. And even the ones you could somewhat resemble, like say making a Reaper that walks on two legs, isn't going to be practical in the real world compared to actual vehicles. In the same way a sword made to resemble an oversdesigned fantasy rpg sword wouldn't function well in real life. There is still very much a fantasy element to this technology, hence why it's called MAGItech. I could understand if Garlemald was sending out realistic looking tanks etc, but the magitek vehicles we fight simply are not practical for actual battle i the real world and rely on it being fantasy technology that works more effectively than real world versions of it would. There's a reaosn we have tanks and not reapoers, helicoptors and not flight armors, aircraft carriers and not massive flying flagships.
Could you make a reaper with a million dollars? Probably. Could you make it fire energy blasts and make it an effective battlefield weapon to the point any sane army would have htem mass produced? I doubt it.