To minimize time the property is vacant, have the Realtor coordinate with the existing Tenant for the last 30 days of their occupancy for showings so you have the best possible chance of securing a new Tenant without a break in between.I would love to know some of the details of your property, and do a rental rate check up to confirm you have the right price. 

Do you have any suggestions on how we can secure long-term financing under these circumstances?

By more people do you mean more media outlets? 

Most of my money is in it since 2018 because of the cross collateralized security since it is a debt fund and i steadily cashed out of all other syndications that have continued to deliver less than promised or not deliver at all.

When rates re-trace and other folks start trying to deploy the capital, I want to know I secured the (right) asset.

You can also promote it on STR outlets (or your agent should).

Lock down the spot get it secured...That is exactly what we're looking for.

If you mean security backed by collateral, you are correct.

This could help secure a higher LTV while you build STR rental history.

I completely agree with @Ashish Acharya's points about the cost-effectiveness of a HELOC and the potential credit implications if it’s secured by your primary residence.