I have this one too and your right...its very easy to use. It came in the kit I bought a few years back. For $19 maybe $24 with shipping why bother with renting one. Hell for me thats not even a tank of gas.
Of course if you cant spare the cash ( I have been there before) You can always save every bottle you get your hands on....juice bottles, cheap wine bottles (these are also great as 1gal carboys.)....just about any bottle that you can seal up good will work. If its for your personal consumption I wouldnt worry bout putting it in a pretty wine bottle. My personal stash goes into big ole plastic juice bottles. Coke bottles work fine too. Just something to store it in and keep the air away from it will work great.
If your taking it more seriously than what I have described then 20 bucks is a small sacrafice....heck its gonna cost you that just for 100 corks.
Hope this helps you decide.