We also have propane gas logs and do not use enough to meet the gas company minimum. I bought two tanks (100-pound cylinders) at TSC and take them into the gas company myself to get them filled. They have no problem filling them as long as they are within the hydrostat test date (10-years). At the end of 10 years I plan to throw them away and get new ones with all of the money I am saving! In fact, we are installing an LP generator if I ever get around to it and I will buy two more cylinders for it as well.
Don't throw 'em away. They can be recertified for a nominal charge and be good for another 10 years. Re-cert can be done at most propane gas company distributors.
