It may be they are making an attempt to list the 'market' value along with what their 'assessed' value is.The links under book and page on the picture you displayed should navigate you to other pages that will be the actual document.

On the flip side, you do have to adhere to more strict rules and guidelines as an agent such as displaying your broker on all marketing materials.My personal advice would be to go for it and get your license, and then hustle as hard as you can as a full time investor!  

You can, however: price your rental competitively, update your booking appeal (look into Instant Book), attract more positive reviews, respond immediately to prospective renters, provide professional photos, limit cancellations, write responses to your reviews to display engagement, property updates/improvements, etc.

Meaning either EVERYONE is breaking the law, or more likely, the zoning displayed on Redfin is inaccurate or refers to something else semantically, like “No STR” means no hotel / motel buildings allowed to build on this land but a 4plex that can be used as an STR is permitted?

You probably went with the Austin-Round Rock metropolitan statistical area to choose which zip codes to display, but as you build out this and future city models I think it would be worth considering surrounding zip codes as well.

My question is more in terms om how do I actually collect this from guests via Airbnb (since they dont collect automatically to your point) and I am afraid they may be penalising me for collecting surplus tax in how they display bookings. 

It is only applicable for first year of ownershiphttps://singlefamily.fanniemae.com/media/4051/display

I was going to post a rental on Zillow group (Zillow, Trulia, Hotpads) but it seems like they display a public record of previous rental listings (including date and pricing) for every property, which I really don't like.

This may be a result of HUD not displaying the appraised value anymore on HUD Homestore.

Without pilfering through the numbers you displayed in great detail I can say this:Find out what the Property After Repair Value is (be conservative, tight comps)The exit strategy for yourself or anyone who you could wholesale this to depends on how the Property is Performing, or how it could perform.