@Brian Neyhart yes, this is a common method to use....if you have the equity to do it.  

I would listen to the numerous amounts of podcasts that discuss this in great detail.

Check out Jalepeno Solutions for good drywall crack repair methods if it's cosmetic.

I was able to mess with it today and got my info onto a spreadsheet through a 'brute force' method.

If possible, try asking another sub what happened because sometimes it’s not really the GC’s fault at all or maybe it was just an honest mistake that can easily be fixed by simply clarifying expectations.If you have tried all of these methods but nothing seems to work out in terms of communication between yourself and your contractor, maybe the most effective solution is fire them.

Any reasonable allocation method is fine.We usually use square footage to allocate basis if there are different units, but per unit might be fine if there are a lot of units and they are all roughly the same size, give or take. 

This is why we use HML with the BRRRR method.  

Then you choose the best method for your strategy on that property.Best of luck!

This same question has been asked and answered here on BP numerous times.

Im open to any options and would like to hear about various methods.