Most serious and qualified tenants are searching on the major 3rd party platforms you mentioned + realtor.com, redfin, and a few others.Apartments.com & homes.com are owned by the same company and may offer some additional marketing options.Another strategy to consider here is social media - video marketing.

It is NOT like what social media or influencers try to paint, it's hard work. 

So here is what I do:1 - Get buyer criteria for what they are looking for (exact criteria)2 - Go source that criteria using data provider3 - Scrub the list and plan a marketing campaign around it (i.e) > Direct Mail > Cold Call > SMS > Online Ads > Social Media, etc4 - Once I get inbound leads coming in.

I've added a revenue manager in the last month for the STR business and am meeting with a social media assistant next week. 

It can be easier than cold outreach, especially if you offer them guaranteed rent and hassle-free management.Also, marketing can really help you stand out—whether it’s through listing on multiple platforms, building a solid website, or using social media for direct bookings.

It takes actual thought and a programmer's mind to be able to build a CRM into something that's actually effective (sure a basic person could setup a phased text message or email automation, but it's tying everything together with opportunities, automated campaign re-entry/follow-up, social media integrations/automations, etc that is the real value).

Similar issues happen with VRBO and Airbnb electronic payments:(

I rented before I could even put on the market with one social media post.

Post on social media what you're learning.

Beware syndicators active on social media.