He said to just put at the highest setting and change filter more often filter cost is honestly nothing for Airbnb hosts.

Should I provide my guests with bottled water or a Brita water filter or leave it up to the guests to bring their own water?

One option might be to explore adding air purifiers or filters directly into the system to help mitigate odors.

I think it's great as it includes warranty information for appliances, type of hvac filter, light bulbs and general maintenance etc 

By all means give them a note on how to use all of the appliances (eg clean out the lint trap on the drier after each load, do not use dish soap in a dishwasher, change the furnace filter regularly, etc).

The lot is flat and level, so we only need a short gravel driveway.

There is a filtration (basic ) in thee garage that came with the house when I purchased, but the filter gets rusty in about 5 days.

Their fill hose sprung a leak or something and hundreds of gallons of water poured into the apartment below them.

Let your criteria do the filtering for you.Regarding retention and renewals, the only time I have asked people to leave is when they have had rent payment issues and/or damaged the property. 

Hi, Anthony, yes, I have had a lot of trouble with DM returning incorrect data - wrong owner or owner not found, wrong or no mailing address, very few sale dates, and now when I filter on lead status, it does not return all leads with that status.