If you are trying to piece everything together yourself remotely I think the time and brain damage and extra cost in time and cash you would be better to go yourself and do it. 

I own a similarly sized 4-plex on the same street two blocks away whose appraisal dropped from 1.674M to 1.434M (14.3%) for 2025. 

This is my first extensively water damaged home that I may purchase.

I like to say it goes block by block.

I'd check for that before installing LVP and replace the subfloor where needed and treat any termite damage. 

But I draw the line when there is risk of damage to the property, annoyance to the neighbors, health concerns, pests, etc.

With new construction and renovations going on, on almost every block.

Really low prices bring dregs and all the work you did could get damaged.

Even though I don't have long hour blocks in my day where I can dedicate to REI education or execution, these little efforts each day have taken me further than I was just a few months ago and will continue to take me much farther in my REI journey.

If I was the tenant that got damage from another tenant's water heater, I would expect him to pay the bill.If it was a pipe in the building and not in their unit, then I would think the landlord would be responsible.