Focus on your reputation, not the commission. 

Confirm that the provider has a pristine reputation (e.g.

Half of my portfolio is OOS, and I haven’t seen most of those, even after 10 yrs, but I get trusted people to take pictures and I send specialized trades (plumbers always and sometimes electricians) during DD period.

Reputation  has its benefits.   

@Andres Rodriguez and @Srikant Puvvada Southern Impression Homes is a pretty reputable group from what I've heard, but I haven't interacted with them myself.

I literally get a Christmas card from my Plumber - which tells me we are one of their bigger customers. 

So you're looking for GC to give you his Sub-Contractors, like plumbers and electricians?

That comes down to the lender's reputation, skill, and willingness to get the deal done.

What is the best way to find plumbers and handymen who work for themselves and would run over to deal with things, and perhaps have a key that they can use to get in if the tenant is not there?

It’s got a reputation for being pretty versatile.