Has a big start/stop button, you can write notes, and can be exported into Excel.

While emails give you something in writing, they can be hard to tell the tone of the person. 

If yes, it will be difficult to be a part time agent if you can only work at night and weekends (meaning phone calls, texting clients, showing apartments, writing up contracts, etc).

The likelihood of all of these occurring is low in a typical subject-to transaction. its why way back in our day we did these with wraps CA has a debt instrument called an All inclusive Deed of Trust it wraps the orginal mortgage it is a second in function my dad had a company called CA wrap back in the day and did hundreds of them.. its de ja vu all over again.. he did this during the Carter interest rate spikes just like sub too is now coming to light in a big way because of interest rate spikes.. 

Maybe you can convince everyone involved to convert to a community owned system, with a shared maintenance agreement, reserve funds,Just need to find the smoothest path forward to needed upgrades like an above ground cistern, pumps, backup generator, better filters, or whatever to make the system function 100% of the time$1500 is minimal, spend it if that's the way forward.

Get a spiral Binder and write down everything in that binder as well as take pictures with your cellular phone.

Put it in writing and make them sign it.

So let's say out of state landlord fail to make a payment , bankrupt pass away etc the agent is responsible. that is the problem and that is why I mentioned most property managers would not do it.Ok, I see what you are saying and perhaps this is a language issue since you seem to be in Canada and the author of this article is writing in proper American English!

My agent says the only way for her to get back the ability to write me Hartford insurance, was to send a written notice that she was to be my agent with Hartford. 

If you THINK they allow that, get it in writing.