although I haven't had my first cache yet, (will change in about 7-8hours hopefully)
I have decided to give it a shot for the challenge aspect of it. Plus I hope to become healthier and happier by doing it!!!
Get out of the house for a few hours by myself, enjoy the peace and quiet, plus it will cause me to get up off my rear end.
Once you get the GPS, there isn't any other lump sum expense involved. by doing a search in my small town, I see that I can probably put $10 in the gas tank and be able to attempt 10-15 geocaches.
Just my 2 cents worth.