These updates include modernizing the interiors and improving the overall appeal of the building to attract tenants.

In addition, several items can be done simultaneously (I highly recommend this to save time as time is your enemy) such as doing the exterior siding or stucco at the same time interior rough electrical and plumbing is going on.Foundation is always first and rough framing follows that (which includes windows and exterior doors).

You will likely have common area lighting (interior and exterior), perhaps heating and cooling too. 

I am wondering if the interior stairs are typically removed to allow for more sq ft in the basement unit as well as greater security  between the two units?

I do not recommend backyard especially if you have a pool or hot tub and certainly nothing interior!

You can deduct the cost of labor and parts to maintain or repair your business assets, as long as the expense doesn’t prolong the useful life of the asset or increase the value of the asset.Tangible Property Repair Expenses That Are Deductible:Replacement of LightingRoof repairsResurfaced external or interior floorsResurfaced parking lotsInterior or exterior paintingReplacement of doors and windowsRekey locks

Exterior could be the issue, but everything interior should be fine.

So far, I've replaced the roof and siding, and painted the interior.

Interior Stairs29.

Was wondering if anyone had any good recommendations for the following: General Contracting Interior Designing Any info would be incredible!