Lots of people (yourself included, probably) use caffeine to relieve physical stress.  A cup of coffee can focus the mind, both spiritually (the coffee ritual has potent rules and practices) and physically.

DAILY NAG:  Brew some coffee for your guests.

Many funeral homes invite folks into their (funeral) homes to make intimate arrangements but offer no refreshments.

Would you invite these same people into your personal home without offering at least something for them to drink, if not a full meal?

Stop complaining that you can’t afford it or that you don’t want to clean up coffee messes.  It’s part of doing business.