This is probably one of the smaller things they are going through in the middle of a divorce. 

I made the old tenant sign a mutual termination letter so that I can lease the property to the new tenant before the original lease end date.the property is going to be vacant for 15 days as the new tenant is moving in In middle of the month.I have a doubt...

Duplexes can be build for around $85-100/ft2, assuming middle grade finishes, this does not include land or soft costs.  3-4 unit building would be a decent amount more on a $/ft2 basis due to the use of different code and the increased fire & safety systems. 

Is it a big city, small town, middle of nowhere?

Solid middle class markets, less risky.

The truth is usually somewhere in the middle and if the Listing agent did thier job well then hopefully the asking price is reasonable.

3) The make-ready on a 1600 sq.ft middle class SF is much more expensive than a 1000 sq.ft apartment.

They're not doing so hot, and many of the out of state investors come in breathing fire and run out in the middle of the night white as a sheet and in quivering fear someone will hear about the shaved Steel City orangutan they woke up next to.

Dave Ramsey offers good solid advise for the average middle class slob who can’t control himself but his approach is so conservative in this day and age that you won’t make much for fear of risk and you will save till your dead using his methods . 

It was the middle of april when i presented the notice so they were informed to be out by the end of May.