LOL!
I have a paper towel stash and an aluminum foil stash...lots of times, if I just use foil to heat buns or rolls, it is perfectly clean and I use it again! I reuse washed ziplocks, too, unless they contained meat or something fatty.
I have my luxuries: a hot tub and a pool and I am perfectly willing to scrimp on other things to continue to enjoy those toys. BTW, both are 22 years old, have been well-maintained by my handy husband and have had replacement parts. But they still do the job. I just need to save elsewhere to afford the extra electricity to run the pumps and the propane to heat the pool.