The immediate things that I see are new soffits (13,000 sqft rectangular building), some brickwork in two areas (some loose bricks and settling), a hole in the parking lot, new outdoor lighting, painting the exterior doors and architectural arch-like things on the upper windows of one side of the building and the faux balcony things (including railings) at the upper windows of the opposite side of the building. 

Appraisers come in all types business, real estate, notes, jewelry, etc. most appraisers don’t want to lose their license and will do a professional job and are willing to defend it in court if necessary.  

Funny story: I bought a vintage Norton sharpening stone for a $1 once at a yard sale.

Instead on Redfin use the filters to find Comps; properties that have Sold in the last 3 months, similar style, that are within half a mile of the subject property, that are about the same sq footage, about the same vintage, and about the same level of finish. 

I am rehabbing a small 1950's cape that I feel has a really good potential but like many capes of its vintage it has a pretty claustrophobic floor plan downstairs with many small rooms and 7' ceilings. 

@Josh Beller lowes has some very pretty faux tile tub surrounds.

I am looking for a 1980-2000 vintage asset in the south to southeast side of Houston, Texas.

I recently added a vintage home, a HUGE one, to my inventory........already have a very qualified tenant.

Those ARE real expenses that are going to effect your NOI and therefore cash flow.You can also ask the what the market cap rate is for similar properties of size and vintage and if the seller has any flexibility in the price.   

After looking for a bit you should be able to get a pretty good feel for what is typical for the area and vintage of property.