I'm not a GC but I've co-owned a GC company and also have some interest in possibly getting my license. 

There aren't many multis in Essex Co that won't get multiple bids and sell over ask and if you find one, it means all of the experienced investors passed, so that should tell you all you need to know.

Lurker here for years, 24 doors across 8 properties all LTR in Colorado mountains.    

Seems the landlord should hire a PM co.

Per statute, the name: "must contain the words "limited liability company" or the abbreviation "L.L.C." or "LLC", or the combination "ltd. liability co

I see you are based in CO.

Yes, this is true, but even in states where you can charge more such as Colorado, we still only charge 10%.  10% seems fair and is more agreeable for the clients. 

Now all hope is not lost, what you could do is bring on a co-gp in the US to partner with where you bring the money and some analyst experience and they bring the other piece of the puzzle that you are missing.

Our local rental portal (Co Springs) for the MLS is awful, but has a few good comps on there.

They have provided us with actual data quantifying how much a certain amenity adds to your short-term rental revenues.I tell all my STR investors/second-home buyers in Colorado to get a hot tub, for instance, but while I know you do better, it's been hard to put numbers to it.AirDNA's March report has tried to tell us how much more revenue a home with X amenity gets over a home without X amenity.