Yes, it takes some work, but most tasks can be automated.

If there is no way using the MLS, is there reputable software out there that automates the process?

You need to get your rentals to be capital gains, you can do this if someone else is managing it, or it's automated type thing, just like a stock investment.

Products such as Live Chat and automated response (ex: FiveStreet) have emerged.

Hi there,I'm going to launch a Messenger chatbot from this template to automate my mortgage business:https://botmakers.net/chatbot-templates/explore/mortgageDoes anyone have experience on how it can be integrated with Salesforce CRM?

Buildium has integrated accounting software in addition to online rental applications, integrated tenant screening, e-leases,  online rent payment (with automated accounting) and (recently) cash payments via paynearme.

There has been many hosts that are able to own multiple properties with having the whole experience automated.

Let me know if you're still interested in finding out how to automate this process.Thanks!

With a paid subscription you can unlock automations such as preset task lists. 

They both have codeboxes tied into a software system that automates showing scheduling and access code delivery.