I see someone already mentioned using Airdna.co rentalizer feature.

The only warning I would share is recognizing when not to use the auto search feature and what search adjustments to make. 

After all, you get better at what you focus on.That being said there's an interesting video of a guy featured on Millennial Money that is both a realtor and appraiser.

Any particular features you're looking for?

When talking with potential realtors, make your requirements clear up front: ie I want to see xx house per week, make xx offers per week, looking for a house with xx features (in order of priority), etc. 

It has been a nerve-racking time as an owner, I will not lie to you.

Property features four (4) Identical 2BR Apartments.

Additionally, I'm not seeing much more in your feature set that you can't do with a simple Google Shared Calendar (maybe throw in a Zapier flow if needed)? 

Those who like them are fine with the differences and appreciate several features of those differences.

It's going to be nerve racking but you'll make new connections and grow your team.