I also have a ton of property management experience and offer tenant placement.

This method is simple but not precise.

There's no precise figure because no one will understand your STR or market as well as you do- or, as well as you will (with time).

Use tools like:Airbnb Analytics: Monitor impressions, clicks, and overall CTR.IntelliHost: Analyze your listing for category placement and CTR improvements.RankBreeze: Track your listing's performance and ranking changes.You can also A/B test your photos by rotating lead images or running Meta Ads (Facebook/Instagram) or Google Ads to measure which photo drives the most engagement.The Airbnb algorithm is continuously evolving and every host should pay attention as new features are rolled out. 

So, if you don't have time to do that, you can hire a PMC to do placement only, even an agent, but recommend YOU have final say on approving them.

The precise property forecast can vary depending on a lot of factors but the general demand is really what you should use the tool for to make your plans. 

Beyond the Monthly Management, Placement & Maintenance fees, all other fees in our contract are IF EVENT -> THEN fees.

I would want to automate the marketing and channels - which would be where precisely?

Sounds like you have the motivation & ambitious but precise goals.

This is typically the slowest time of year for tenant placement, at least in our local market.