It makes sense for Airbnb/VRBO's algorithm to shoot new listings to the top of the search ranks to "reward" new hosts for coming on the platform.

Do you know of any websites or platforms where I could go to analyze and practice seller finance and creative finance deals?

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.

Usually it takes them weeks to respond and they come up with some crazy stuff like by business is paying for the trip and need to pay with a certified check outside the platform.

Our listings appear across so many platforms I would not know which site they stole them from. 

This allows you to work with your chosen professionals while still benefiting from Lula's platform for coordination and communication."

We lease a platform for online access and efficiency with both a lender and investor portal.

AirBNB is a platform where you list that STR.

But i still want to list on platforms like VRBO/ABNB.

Use STR-specific insurance to protect both parties and automate operations with platforms like Airbnb, TurnoverBnB, and PriceLabs.Taxable income from the STR must be reported, but you can deduct related expenses like cleaning, utilities, and furnishings.