Many reasons: to encourage/discourage certain economic behavior, to appease a certain industry lobby or some fellow lawmakers or even sometimes a private individual, to buy votes, to balance economic effects of a new law, as well as simply out of incompetence of our lawmakers.

So the effect is a confiscation of private property and a transfer of the property for no cost from the landlord to the tenant. 

They’re just more pronounced now because we are printing soo much money and use debt tools with derivatives, etc in my opinion

I always see people posting to stay away from D/F neighborhoods, but I don't ever see how exactly to determine that - I've read a breakdown of what each class entails, I guess I'm just looking for a tool that tells me that instead of trying to figure it out on my own in an area that is not well known to me. 

Find out where you stand (whether they'd give you the loan, how your credit score effects it, and what your mortgage payment would be).

How do you effectively determine this and how do you propose to the bank to support your rehab costs (again guessing this has to come out of your pocket?)

Leverage my expertise to connect with top-tier, peer-reviewed real estate professionals and discover the best funding options available on BiggerPockets.What You Can Expect from BiggerPockets' Concierge Service:Personalized Assistance: I'll ask 6 to 10 questions to fully understand your strategy and timeline.No Hidden Fees: Enjoy this complimentary value-packed service as a thank you for being a Pro member.Powerful Tools: Using BiggerPockets’ advanced Finder Tools, I’ll conduct an in-depth search and, with your approval, connect you with investor-friendly agents, lenders, tax professionals, and property managers.

TT and Youtube also, but you'd have to funnel them to IG to be able to effectively DM.  

This will be the brains of your whole operation and is a life saver even with just one property.3)Use dynamic pricing tools like Pricelabs.4) Depending on the budget, look into getting a second person on the team called an "inspector" (not home inspection but STR inspector) who will go in about an hour or 2 before any check-in and make sure the home is ready.

Leverage my expertise to connect with top-tier, peer-reviewed real estate professionals and discover the best funding options available on BiggerPockets.What You Can Expect from BiggerPockets' Concierge Service:Personalized Assistance: I'll ask 6 to 10 questions to fully understand your strategy and timeline.No Hidden Fees: Enjoy this complimentary value-packed service as a thank you for using BiggerPockets.Powerful Tools: Using BiggerPockets’ advanced Finder Tools, I’ll conduct an in-depth search and, with your approval, connect you with investor-friendly agents, lenders, tax professionals, and property managers.