Tell him you're being watched by the DEA and local LEO. They've offered you their protection if you turn in people selling large quantities and other drugs. Ask if he knows anyone like that. This way you guys can grow as much as you want. When he never calls you again and avoids you in public, you'll know that everything is fine.
I'm only slightly joking with the above.
The other option is to tell him you're infested with mites, thrips, fungus gnats and would rather not contaminate his plants. Or set an unreasonable price. Tell him you want half of his crop for keeping and vegging his plants. Plus 2000/month for the risk and liability. With 10,000 upfront to get started.
You've already let the cat out of the bag. Now it's time to spray it with water and get it to go away.
I'm only slightly joking with the above.
The other option is to tell him you're infested with mites, thrips, fungus gnats and would rather not contaminate his plants. Or set an unreasonable price. Tell him you want half of his crop for keeping and vegging his plants. Plus 2000/month for the risk and liability. With 10,000 upfront to get started.
You've already let the cat out of the bag. Now it's time to spray it with water and get it to go away.