It will be easy for you to check if they paid on time, as you can check instantly online.  

You said in your post  "If the notice was delivered by mail then the notice period begins when the Tenant actually receives the notice."

In my area (near the beach) its mostly families and they want cabanas, baby items, chairs, coolers etc that we do not provide but I have a local vendor that delivers and picks up these items and charges a few dollars per day for each item, and give me a 20% referral. 

They force you to take instant bookings without any ability to screen guests.

If you are nearby, if you have ever been a pizza delivery person, maybe deliver a pizza to the wrong house that may or may not be the one being foreclosed on so atleast you can see inside a small portion. we used to just go knock on the door some folks would actually let you look around.

Does anyone have any machines or vendors that they'd recommend that would deliver?

Almost an impossible way to “get started” as you’re going to need full purchase price in cash on hand or a HML willing to instantly fund you. 

In the end you always roll the dice on guests.I don't allow instant booking.

In our experience, things move in ebbs and flows and the speed of rental depends on your asking rents relative to competition.For example, there was a period of several months at one of our properties when a 3 or 4 BR unit came on the market it rented almost instantly. 

Now I get to sit back, relax and collect $2300/mo in rent plus about $100k instant equity because of how the market is over there.