I've been renting hash power and trying to send to my solo pool but it doesnt work because the difficulty is too low. Is there anyway to increase that or is it not worth it?
A. Renting hash to point is a bad idea. Throwing $$ at your private node is insane... Do you have the redundant infra and connections to the 'net? Odds are - no. I would NEVER risk losing a block in an orphan race against better connected pools like that...
B. Most hash rentals require an initial minimum diff of 1,000,000 to run due to the size of the 'mega-miner' they are providing.