It screams of being a scam. 

Cities that do not rely on visitors often see STRs as a threat to housing or neighborhood stability.

What would be some things that scream red flag?

If you are renting rooms you want to cover visitors ect. sometimes people restrict visitors in units but I only use the normal clause in my long term lease of permission for more than 10 days/month.

If you need one who is familiar with house hack investing in your target area(s), click here and BP will recommend one.You may already be doing this with your existing investment properties but for house hacking, I'd recommend having clear house rules related to visitors, vehicles, quiet hours, apartment walkthrough access, etc.All the best to you and your family during the transition!

Point her to the lease and local habitability standards, require all requests via one channel, and reply with written triage: urgent, next scheduled visit, or tenant responsibility.

In 1973 while travelling through the Knoxville area I toured the Oakridge Nuclear Facility visitor's center. 

Then visitors click around, hesitate, and leave.

Just scroll to the bottom of your listing link and you can see 4 places that are quite a bit nicer for under $1500.You are offering small 900sqft with an original kitchen, only ONE bathroom that is dated and has no counter space, an interior that is a mix of finishes and colors, tile ceiling, super basic light fixtures, no garage and a totally overgrown yard - all of that screams total neglect.

DirectionsWebsite2Hollywood BeachLocated between Fort Lauderdale and Miami, Hollywood Beach boasts a beautiful boardwalk, family-friendly atmosphere, and a variety of dining and entertainment options, appealing to a diverse range of visitors.