Is there a requirement as far as how many employees you must have (i.e. cleaning employees-room ratio)?

We conduct annual inspections, furnace cleanings, etc. 

I have been cleaning house a bit lately.  

You can install the self-cleaning fill valves that have a little clasp on a chain that keeps the level-line bobber in an up position until the toilet is flushed.  

What might be the thought process of other experienced investors, if its clean over the last 40 years, should I get it.

I'm thinking I should get the double panes for the insulation (hot in Florida), but only the single hung (tenants don't clean windows).What are your thoughts?

Tell me, would the transition be even easier if the tenant left the property in broom clean condition?

I always used satin in my own home but am hesitant in the rental because I know it's not as easy to clean.

Tenant will care for the premises, keeping them clean and clear of debris."

I'm not sure that anyone has really come up with a way to truly identify "vacant" houses, but the list was pretty clean and did generate some calls in a limited 3-mailing test I ran a while back.