Do you always mandate all contractors to provide W9 on your BRRR?

[Michael Ndjondo makadi]

Good afternoon BP investors. I'm going through my first BRRR property and I was wondering if obtaining W9 from contractors during renovation is always a good strategy. I have conducted my due diligence (license and referral checks and current project inspection) on contractors that I'm about to hire just to find out that the plumber doesn't offer W9 to customers. They provide receipts but not W9. That makes me think if this should be a deal breaker or not. They provide quality job at very competitive price. Is current savings as valuable as long term tax benefits for equal amount of saving at present time?