I know I got into RE Investing to diversify my portfolio out of equities and gain financial freedom, not to have answer the deep questions about life; however, knowing where you want to go and why makes planning the route easier and putting in the extra hours have a purpose.I'm sure you've heard of it, but your goals should be SMART (Specific, measurable, attainable relevant, and timely) You're more than half way there with $450k gross rental income.

Since, like others have said already, I don't think this is an "infestation" by any measure.

Measure the differences and the success using the BRRRR method is limited and minimal compared to the alternatives. 

I would say that most of us fall into that category of course success is measured individually. 

I don't deal with averages or percentages as goals or measuring sticks. 

It was discovered when the inspector sought to measure the depth of the insulation.  

I can help you with the financial analysis, break-even point calculations, sensitivity analysis to various factors and whatever other financial measure you can think off. 

They are finally putting air conditioners in the two upstairs apartments, and are gutting the two downstairs and making it one big apartment, putting new carpet isn't one of their priorities and they are cheap, so I contacted my landlord and asked if I could replace the carpet, I took the measurements of the apartment and roughly it could cost anywhere from $350-500. 

Some measure it as net income from the property (which is rent minus all expenses) divided by the loan payment.

That's a big disparity if accurate.I think vacany rates for C/D properties are harder to truly measure.