I was concerned because the tenant has roofing supplies all over the back yard in addition to a trailer and roofing machine in the street. 

You can run an ozone machine for a bit while no one (including pets, but assuming they have none) are in the house.

They also rent the big professional sanding machines for about $75 for the day, and about $25 for an edge sander.

Meanwhile the conversations my mother had the most of was with the dryer or washing machine or real intelligent ones with us kids..

Money is the fuel that keeps the machine running . 

One more was fairly bad (too many people living in the unit, causing a nuisance, etc.) and we just gave them notice to leave, and to soften the blow told them they could take the washer/dryer with them that came with the unit (we don't want those crummy old machines anyway - we don't include w/d with our units that have hook-ups). 

Appears to be a well oiled machine in terms of the construction and sale process-cookie cutter 1200 sq ft properties.

And a lot of them are going to include things like arcade machines and theaters which will constantly have issues and are difficult to service.Do you have the proper licenses to manage other people's properties in Florida?

I have been using deal machine, and it has pretty extensive contact info on each property.

I've used deal machine and PropStream before and don't "love" either.