Belt routing and alternator question?

[Haaland]

This maybe a dumb question because I can't seem to find any information on it. If I was to run a belt for only the crank to waterpump then and additional belt from the water pump to the alternator and power steering pump would that cause problems? Or do I need all accessories spun by the crank? The way I have everything mount the alternator is upside down which would make it spin backwards... As long as the fan fins are forward face this should not be an issue right?