How do you vet distant professionals?

[RJ Emmett]

Hello, The housing market in my local market is pretty hot right now and finding an investment property has been a challenge. So, I have been looking in other areas of the country (USA). I have been talking with a turn-key wholesaler who brings "everything". Investment, lender, contractor, property manager, etc. Pretty much sign off on the lending and you have an investment. My fear is I sign paper on a property that doesn't exist, the contractor charges $50,000 in rehab charges on a property that didn't need anything. Or the property manager has a history of stealing client rents to support her drug habit. How do you vet the people you need helping you when you're hundreds or even thousands of miles away?