Follow-up campaigns using CRM tools and email marketing software can be valuable for managing and communicating with your buyers as the list grows to see where the real engagement is then separate the quality of buyers into buckets. 

So with the pictures and communication documentation throughout the build it was handled with some negotiations and verifications.

Quote from @Jason Leigh: Here's what I would do.Write a very short, professional letter to the property manager explaining that they failed to communicate with you about anything, particularly the "services and maintenance" that was never communicated to you or approved by you.

With that said he was clear and communicated what he would push back on, why, and how.

The communication (lack there-of) with the PM is an issue but I'd travel there myself and see what's completed. 

Get all of your communication together with this gentleman and make it easy for your attorney to see what is happening. 

@Orhi Tahi I used to work in a bank's REO / Special Assets Dept.We were inundated with communications from people just like you and ignored EVERY one of them. 

Not the best when it comes to communication.

(I also do all of the advertising, tours/viewings, communications resulting from the advertising, but once all of the rooms are rented, and I am purely managing, how are property managing hours discerned, I suppose that's my question here.)

We do 20 Flips/BRRRRs per year and use these tools:Underwriting - DealCheckCRM - ClickUpProject Management - ClickUpBookkeeping - QuickBooks Online Plus Team Communication - SlackFile Storage - Google Drive