If those pumps are functional, you shouldn't have any concerns around flooding.

And since your COC return is largely a function of exceeding your fixed costs - especially your PITI - most of these dollars left on the table would have been essentially pure profit. 

This is common, particularly for industrial properties in which the tenant may install heavy manufacturing equipment that is expensive or impossible to move.Bill is correct in saying it is a function of what you want as a return.Without knowing what the user (tenant) will install or what goodwill they may have from the location and what leverage you may have at the end of the lease term; you can only work with your desired Rate of Return and the data you have.Income capitalization is a good method for investment value analysis in lieu of good sales comparison and appreciation data:You start with the current market value of the property that can be capitalized by NOI/Cap Rate, depreciated cost analysis, etc. 

Could make the yard less functional for other uses, may require care and maintenance, cleanup of leaves?

The first thing I look for in a househack is a 2 unit building that could function like a 3 unit building - so, like a 2 unit with a bonus attic or basement.

This is one of the most common threads/questions on here... rather than beating a dead horse and having the same convo that's happened a million times before, I'd suggest using the search function for "LLC" and "due on sale."

My function mainly is to run the business and make it better.

The unit is attached to my primary home, has it's own entrance and fully functional, about 400 sq feet, but is part of the dwelling and I prefer for it to be lower key. 

. ($5 per day) ____ Unauthorized Occupant Fee - Individuals not on the rental agreement are staying in the unit past the period allowed for guests and without the approval of the landlord ($50) ____ Unauthorized Pet Fee - Pets/Animals not on the rental agreement have been in the unit without the approval of the landlord ($50) ____ Smoking Penalty Fee - Smoking in the unit or on the premises by either tenant or the guests of the tenant ($50) ____ Smoke Detector or Carbon Monoxide Detector Tamper Fee - Detection device in the unit has been tampered with and is not functioning (Up to $200) ____ Property Damage: _____________________ ____ Service Charges - $20 for each legal notice served related to a violation, such as "Notice to Comply" or "Notice to Pay Rent or Quit".

A few quick comments about iFlip, specifically the bird dog function and process.I'm a real estate investor who was approached in early 2014 by someone who had apparently purchased the system.