Our unexpected cash expenses for 2006...
Wind storm shut down electric for 5 days. had to buy a phone that operated on the 14v phone lines instead of our deluxe system.
Sewer line collapse. Had to shut down for 6 days.
Ice storm. Power out again.
Expenses of gas powered generators.
Ice chests for keeping drinks cold.
Had to buy an answering machine to inform customers of our situation.
Ended up sleeping AT the store since everyone in the area knew we had no alarm system and the police were busy 24 hours a day. My rottweiler was the alarm system for a couple nights.
Household cleaning supplies. It will add up. Pine sol cleaner should be bought by the gallons. Liquid Plumber, lots of it!!!

Super Glue, duct tape, electrical tape, will come in handy when you least expect it.
Air fresheners...Lots of cheap stuff from the dollar store. Room owners know why!
Paper towels like there is no tomorrow.
Vaccuum cleaner bags...you can never have enough.
Recharging fire extinguishers and fire extinguisher permits.
Always save any merchandise that is hard to sell. Dont discount it! Instead donate it to the police and fire department for whatever benefit they have. YOu get the tax deduction and good relationship with the locals.
Keep a petty cash box on hand for wierd emergencies....you someday will need a sewing kit at midnight. Yes you will! Take my word for it.
Thats all the ramblings I can think of right now. I am hungry and have to eat.