We add the tenant to our management software to streamline communication throughout the lease duration.

Mine is customized to my properties and my needs.I have a tab for each property.

This might be a good option to streamline communications and you can start building SOPs based off the types of inquiries you're getting.

The listing agent has already done all the work to streamline the sale on their end, set expectations and control the process.Anyone who has ever worked for 4 months on a FSBO and then the seller decided they are not going to sell after all, knows what I am talking about.

Meaning how to attract the type of people you want to your STR listings and how the heck you are supposed to know if there is a market for your type of "customer" in the area you are investing.

If internet is $60 per month, in a 30 day month, you should reimburse here $2 per day or $8.If you choose to offer her more as a customer satisfaction olive branch, that is up to you.

Customer service is unresponsive.  

You can be yourself, truly add value to the seller, streamline the transaction process, and often achieve greater profits.

I have a background in technology and real estate (I was a previous VC-backed technology company founder), so I am very tech-friendly, and I like to adopt solutions that streamline workflow/enable best practices. 

All you get is what you can export/import via CSV file:(We use Propertyware, have experience with Buildium, and have played with Appfolio and RentManager.Buildium is for smaller companies.The other three are tied, the differences being how much automation & customization you want to do.If you don't see yourself growing beyond 150 units, go with Buildium.If you're not very techy and plan to grow over 150 units, we'd recommend Appfolio.If you're techy and plan to grow over 150 units, we'd recommend Propertyware or RentManager.Of course, schedule some demos, take GREAT notes and them make your decision.FYI - there are MANY new options on the market, RentRedi, TenantCloud, Apartments.com, Hemlane, Rentec.