I currently have one of my rental properties set up as a fixed price rent with utilities included (I know, crazy, but it's still cash flowing $1,000+ at least every month) and I was curious to know (a) what is the ratio of people who include vs exclude utilities and (b) what are some good tools, apps, etc that people use to track monthly cash flow?

However, nonqualified use does not include any period of such use that occurs (1) any time during the five-year period ending on the date of the sale that occurs after the last day of use as a principal residence, or (2) any time (up to two years) that the taxpayer is temporarily absent due to a change in place of employment, health, or unforeseen circumstances. 

Any platforms that allows to keep track to have this at my fingertips in an app that isn't an Excel spreadsheet?

Tell them that the lease is not being renewed and they and all occupants must be out by the date specified on the lease.

Apps such as AirDNA, Your Porter, Google Suite, Zapier, when utilized together can effectively handle the 75% leaving you to simply take up 25%. 

Also suggest she moves to an online payment like zelle or paypal where you can request money by a due date to gently remind her and then send ongoing late fee requests to for the late fee as it builds so you don't have to feel you are walking on egg shells.

I understand the competition is hot in Florida and multi families are priced really high right now.I check the online sites regularly and find duplexes listed for ~200k but they're usually already remodeled, so I assume there's a deal or two somewhere..I should add that I'll be using FHA financing so maybe fixer duplex is the wrong description, dated perhaps, so I could still use the FHA loan if that makes sense.

On a house that rents $575 or even under $1000 you really cant turn a profit while keeping it fully up to date on maintenance/safe.

I understand the competition is hot in Florida and multi families are priced really high right now.I check the online sites regularly and find duplexes listed for ~200k but they're usually already remodeled, so I assume there's a deal or two somewhere..I should add that I'll be using FHA financing so maybe fixer duplex is the wrong description, dated perhaps, so I could still use the FHA loan if that makes sense.

Probably my age showing, at 56 I would likely keep the $800 month knowing that at a later date I would still have that equity and be able to sell for something similar (while there are ups and downs I choose not to sell when the market is horrible).