For a number of our properties I simply require the tenant to take a photo of the reading on a particular date each month, email it, and we subtract that usage from the main meter usage to determine the charge.

If you don't mind kicking people out and you plan to reposition the building, then you would need to factor the relo fee into your cost of doing business (I've had success presenting a table with all the expenses I anticipate, and subtract that from the asking price to come up with a below-offer purchase price. 

The real interest rate for all types of debt is still negative (this is calculated by subtracting inflation from the interest rate). 

Then look for houses that will be priced so that, using the zillow, trulia, whatever, calculator, when you look at the rent and subtract off the calculated PITI will produce at least $200 a month. 

My question is, if I gross $1100 rent on a property, spend $100 on random utilities, small repairs, etc. do I subtract those expenses from my 20% before depositing into my long term savings?

After you subtract out rent, utilities, internet, etc. we're still netting over $1k+ per month.  

The capital gains tax is only on what your "gain" was ... you take the amount you received at sale, subtract commissions and transfer taxes and any costs of sale (including fix up costs) ... and you subtract from that amount (your "net") ...everything you paid for the property.  

When rental income does not show on your tax return, Fannie will take the gross rent per your lease and apply a 25% vacancy and then subtract your PITIA as you mentioned above.

I think the standard is pretty good, and just let it evolve as you do, adding or subtracting what seems relevant. 

To make it easier, I subtracted the $80k from the $280k purchase price in the BP calculator.View My BiggerPockets AnalysisMobile Homes in the ParkProfit & income is as reported on taxes: