But, I'd like to focus only on value-adding renovations (for rentals of course). 

We have a 14-page management contract that we've added our real experiences to over the years, with the intent of protecting both us AND the landlord.

One option might be to explore adding air purifiers or filters directly into the system to help mitigate odors.

In the city or more urban neighborhoods though it's definitely more commonplace.I've added off street parking behind a property off an alley like you said at least a handful of times.

Nate @Nate Marroquin   You can use the income from your tax returns on the current rental adding back your paper loss (depreciation) and add back the mortgage interest, property taxes, home owners insurance deductions on your tax returns. 

After year 1 we added more originators, more processors, an appraisal review analyst, a VP of capital markets. 

Expectations for a higher standard of decor and theming has infiltrated this industry and those are the ones that do well.

Added capital and acted s general contractor for compete gut remodel What was the outcome?

It's near impossible to cash flow when most homes are selling for above $750K, Taxes and Insurance added in the PITI payment is higher than the rents.You can buy a Duplex 2 unit for example in either FL, IN, or OH and not pay more than $200K the rents are typically $1200-$1500 a door.

It all started with removing some interior walls and changing the floor plan, removing a chimney, adding a bedroom and bathroom, installing patio door to the backyard, and completely renovating every other interior element What was the outcome?