Furnace and AC filters, dryer vent cleaning, gutter cleaning, smoke detector batteries, storm drains, wood burning fireplaces/chimneys, exterior window washing, roof cleaning, you name it.

https://www.wdrb.com/news/busi...

I think everytime we speak he's about to run out of battery on his phone.

The market is so skinny that if it was a person it would start hoarding toilet paper, batteries and jars of peanut butter because the zombie apocalypse is just around the corner.

A 250-year old grandfather clock, where I took the broken guts out and replaced with a battery movement, etc. 

You can see the frequency at which they buy and hold properties by examining the sale history of the property (you could also do this on the register of deeds site).When you have the funds invest in a good CRM/database and have a module or app to keep track of your cash buyers.

There are numerous examples none of which they have the man power, batteries, or factories to produce. 

Most management software made for those with that number of units and up will have document creation/signing modules built in. 

It is usually the Landlord's responsibility to repair/replace anything that belongs to the rental, except for consumables (e.g. light bulbs or smoke detector batteries).

I assume you asked them if the batteries are dead?