I'd also ask if they add on a service fee for when they make maintenance calls on your behalf to vendors.

I'm looking for in vendor in Washington State so if anyone has a referral that would be greatP-

Would also tie it to a lien waiver being signed by the vendors, might be something else in Texas, I'm from Louisiana. 

Any rules in place on contractors / vendors?

I'm in Arizona near UofA and although we post with all of the major vendors, 90% of our calls and later tenants have been through Zillow.

I have a few of my vendors that do what I call turn key light... they allow the buyer to do the BRRR ...

, or a personal reference but if you don't mind me asking, how would you find a vendor/seller who wants to get rid of his multi family? 

List the people you paid money to in order to assess the property,  as vendors, and pay them as you would any normal vendor via the checks you wrote to them. 

If you are buying on "contract" the City of Des Moines requires a third-party inspection from an approved vendor (seriously) and are potentially moving towards having city inspectors conduct the inspection (speculation).  

They bring us deals, help us find vendors, provide guidance on deals, help us determine market comps etc.