As I've mentioned before this info seems problematic.

1) Cheaper rentals
OR
2) Paying miners better

You can't do both.

If you are paying miners 6% more than pools, then buying mining is going to cost a lot.
If you also add your fee on top of that again, then it's really expensive to do your solo mining.

If on the other hand you are wanting good price rentals for your solo mining, then that 6% + your fee isn't going to do that.

You have two sides in your service.
People trying to sell their mining for the highest price, and people trying to buy mining for the lowest price.
They both clearly conflict with each other.