Hi Christian, I'm a Wholesaler in the Dallas area. I've recently reached out to Realtors for assistance with Comps and ARV as well. In return for their assistance I've offered to send them properties that may be a good deal for them but not for me. I would think that a Realtor would make way more on the property that the Wholesaler would send them. Maybe you could speak with other Realtors in your area to see what they charge.
Maybe ask him to pay your fees?!