How long does it typically take to build a sponsorship relationship before getting a deal?

Based on the experiences shared, it can take 2-5 years of relationship building before a sponsorship deal materializes. Mike DeFord mentioned talking with Cam Reimers for probably four to five years, with at least 10 phone conversations and a couple in-person meetings before any deal came together. Todd Robinson from Vision Wheel similarly knew Cam for a couple of years through racing before sponsoring him. The key is consistent, patient networking without being overly 'salesman-y' about it.