Estimates on 6-unit rehab costs

[Joe Holloway]

BP community...I wanted to get any feedback from experienced members on doing multi-family rehabs. I"m looking at putting in an offer on a 6-unit that needs complete rehab. Total sq/ft is 6440, 2/1 units, in need of demo, flooring, appliances, everything...not high end, just quality living space. Not sure about the condition of plumbing/electrical as I haven't been able to get in it yet.

Thoughts? Are there any rules of thumb on a unit of this size that I'm not aware of?