The syndicator refuses to give me updates and does not return emails.

You can combine both sources in one document to strengthen your proof. 

Most of my renters choose #1 because it provides a clean break.I document everything and I don't accept the early termination notice or start the clock until they pay the termination fee. 

I would not pay 80% upfront, you can go along and make a payment plan while construction is under way, and the result should be mostly the same for the developer, and you don't risk so much before even constructions starts.Have a lawyer go over legal documents so that you know the property belongs to them or if they have it in a trust.

Trying to get a hold of them on the phone/email has been a challenge as well.

I submitted an offer that must have been competitive because the seller responded via email with a counter on terms, then called my realtor and asked if I had seen it in person.

Until now, I’ve mostly shared this journey with close friends and family, but I’ve realized it’s time to open up and document this experience for everyone.

Without an operating document, it's unlikely they could sue you unless it's in the city rules that all homes are responsible.

Because I sent them an e-mail and they sent me the link in the original post (https://www.cmha.net/housing/landlords/rent.php) that shows that amount.

Send a copy of the receipt on an email the old tenant itemizing all deductions.