What are some ways of generating income in addition to renting out the residence in a house like this?

How much cash flow will it generate and can the property afford to give up 10%, do you have time to manage it yourself, and probably the biggest in my opinion are you wanting to get into this game long term or is this just a 1 time 1 property deal? 

I am still trying to get my first transaction/client, and ultimately my goal is build leverage from my initial deals to generate more leads and more business to make a full transition into running my own RE practice.

CPAs won't do your daily operations accounting.

I own at least one rental like this that is zoned one thing but can operate as a multi unit.

What is the typical % of operating expense over the effective gross income? 

The better operators will be able to charge more. 

Other non-code enforcement issues I look for when doing inspections on my own: change air filter, check to make sure toilets are not running, run water in sinks and check drain pipes for leaks, check for signs of unauthorized pets, check to make sure all windows operate, check all GFCI outlets with a tester and make sure they reset. 

As a result, I've put that on the back-burner now (still pseudo-operating) and started my own company to address the same key issue that I faced previously - capital constraints. 

Longer term I plan to move into multi-family to start generating cash flow for future investments/replacing W-2 income.I've spoken with a few real estate agents but wanted to ask the BP Denver folks for some advice:-What are some good areas in Denver metro that people in late 20's-early 30's like to rent in?