What will hold up the sale of a zoned SFH being used as a 3 unit?

[Eric Tan]

What will hold up the sale of a zoned SFH being used as a 3 unit? (with 3 electric meters, 3 gas meters etc etc)
Property is empty and is corporate owned per MLS description.

I am sure someone here has dealt with this type of property in Chicago.
Just reaching out to get in front of any set backs or hurdles. Any suggestions or Steps to follow?

Converting it back to SFH is probably be the best and legit way to go about it, then flip.
Keeping it as a multi unit and BRRRR is very tempting though.
Although the Refi part would probably bump into the same hurdles as buying it.