The best option I see for you, if you can't get the line of credit, is to partner with one of us local rehabbers that have experience to make sure that $70k is legit and keep the project moving on time and on budget. 

Yes, just like @Jon Gibbens said, run your comps and never rely on the estimate that the platforms give you.

As @Jordan Moorhead said, make sure the renter checks out when requesting to book on the platform and use your specific screening materials or questions.  

I put two ideas into one post which has gotten some confusion on other platforms.

Additionally, explore technology tools that streamline remote property management tasks, such as online rent collection platforms and smart home systems for monitoring.

There's several cities not discussed on here that I am investing in and I see other large individuals invest in that do not fit the cash flow $500/mo in the philosophy, but I'd take over almost any area that's producing legit cash flow.

There are numerous platforms available, each with its advantages and disadvantages.

How are people screening and weeding out the legit service animals from the bogus ones, when you aren't allowed to ask any questions?

I would think according to Airbnb's terms of service, that this situation would not be allowed on their platform.

I’m thinking I need a landing page, ideas and content for the landing page, platforms to advertise on in order to reach my target audience, etc.