Multi-Unit Rehab Cost Help

[Chris Klobuka]

Hi All. I'm a new investor planning to purchase a 2/3 unit property within the next year (in Roscoe Village / Lakeview).  Curious if anyone has experience with rehabbing multi-unit properties? I would really like to get a rough estimate of what the following could cost.

HVAC install for all units

Dig down basement and build out to make 1st floor an owners duplex down (2 bed, 1-2 bathroom depending on space, rec room)

Adding laundry (stackable) in each unit

I have had discussions with a realtor and one contractor, however curious in getting more opinions.  Just joined bigger pockets and excited to get connected with other investors in the city!