Hire a cheap crew to tunnel and the real plumber to set and replace the pipe. 

A quick call with a local attorney can set the record straight and help you navigate this without drama.

Also, I have heard about the benefits of having an LLC set up to manage rental properties but not sure if this is advisable at my stage (e.g., not a lot of properties to manage).

Hi Jaycee,Chose this area because my partner already had a section 8 rental here that is doing well and has a team set up.I have no experience with section 8 tenants.Appreciate the advice on starting an LLC.

Set a bunch of them with peanut butter.

This guy tried to pressure me 1 hour to enroll in his program.

With that said I'm curious as to what would be the best business set up (sole, LLC or Corporation).

You have to set them up, market, book and clean. 

The investors that have had these payments suspended have set-up a new Facebook page.

It's likely a scam anytime they sound like AI or the grammar is weird or they use the word "kindly", if they ask for you to respond to them off-platform, if they say their employer will pay for it, if they ask if the dates they've specified are still open (when they can clearly see they are open on your calendar), if they ask for a video of your property (they probably want to set up a duplicate listing with your photos and video and scam others out of money), or if they want a long term booking and they have just joined the platform and have no reviews (could have been evicted from somewhere else, and hope a newbie will let them in with no background check, they'll end up not paying or credit card is bad).