Fixer upper multi family!

[Stephen Sherwood]

Looking at a multi family brick building in a town in Kansas.  They have 12 units & it needs total rehab.  Building is empty, foundation is good and they want $100,000.  It has been on market for 275 days and it has 7956 sq ft.  The building has minimal appliances/toilets etc in them.  Has anyone ever rehabbed a whole building & might be able to give me an idea cost?  Looks like apartments are 550ish sq ft other apartments in area renting for $500-600 monthly. End result could be- $6000 monthly rents.  Idk if rehab will be $100,000 or 250,000.  Thanks in advance!