Yes the machine requirements are a bit higher than usual, but this can be lowered later, we did this because we don't know how the HyperNodes will perform in real conditions. Anyway you can try with a low end hardware and see how it performs, then you can tune up the machine.
About the rewards, the PoS chain will collect metrics about the HyperNodes and you will get rewards on weekly basis. As for "where the reward come", from the miners; 0.8 BIS/block will be taken from PoW mining rewards and the HyperNodes holders will be rewarded for their contribution to the network.
For more info about the HyperNodes please come to our Discord:
https://discord.gg/4tB3pYJ and check
#news channel. Also you can follow our twitter accounts for more info about the project and updates:
https://twitter.com/bismuth_cz and
https://twitter.com/bismuthdevBest regards, G