For commercial properties, we require appraisals performed by appraisers holding MAI designation.  

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

I'd find a mortgage broker who understands your strategy well enough to advise on products designed to help you scale. 

I understand home designs are pretty expensive, and cannot just be applied to any lot/existing neighborhood.

Preliminary planning and design work are underway, with the project expected to bring significant value to the portfolio and contribute to the revitalization of the community.

And of course one can Own a PM company and have a designated broker in charge that is not an owner..

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.