Try using materials that are easily purchased and installed locally such as Home Depot and Lowe’s they always take back broken items no questions asked just purchase the same sink basket and return the old one 

Material defects with the property should be disclosed right away.

No special ordered materials.

@Amaju EtchieHave you accounted for any potential repair costs (labor/ materials)?

I do the listing, but they will also share my marketing materials with their personal networks.

I’ve been reviewing material...I’d like to start talking to pros and possibly getting mentored.

@Xzaviar Deary you should start with looking at the educational material on bigger pockets

As far as materials go, I opened up a Home Depot Pro account, so when the contractor goes to buy material, he checks out at the Pro desk.

I don't want to turn him off to the job by sounding cheap or like I don't see his value.Could I save some money buying materials on my own and providing them? 

No issues since then, but you had better take plenty of precautions secure the house and don't leave any materials or tools at the job site.