10% down 2nd home loan and savings from the proceeds of already owned STR's.

I have a large lump sum saved in an investment account for down-payment and any additional costs.

You got the interest savings right.

Should I go through with taking ownership of the property and try to salvage it for profit or do I refrain from even involving myself in the situation as it may cost more than it's worth to save it?

I started my career working for Marriott in New York and Toronto, specializing in dynamic pricing and maximizing revenue.

We have some $ saved  but don’t have enough to put a full 20% deposit down as needed by most conventional lenders.

If it wasn't for me having enough savings, I don't think I would be where I am at today.

If you're comfortable living where you are, equity in your current property or your savings rate would be the two other ways to get your next one which is going to be much slower.

In the event your property does not sell, pivoting to a rental could be your best option and allow you to maximize return.

That would help me save taxes on the commission.