I used to work in a music shop and some of the strings were eye-wateringly expensive. Electric guitars strings are cheap! Try being a violinist in an orchestra. Or, as Mr Feline was implying (I think) an upright bass player. Some of the most expensive G-strings ever. Some of the pirastro gut strings wrapped in silver can be hundreds of dollars. My violinist friend hated having to change strings. For him changing strings was very much an "only when they break" thing. Not so much because it was a pain to change them, but because on a violin dead = good tone! New strings have annoying resonances to them - they're too lively. He said strings sound best just before they break. A bit like my voice...
When gigging I change my strings for each gig. In some bands where I played 3 sets it was a necessity, and I have quite gentle body chemistry. At home my strings can last for months. It's the dead wound strings I can't stand. I quite like changing strings and half of my guitars have Bigsbys. Once you get the knack for changing strings with a Bigsby it's actually very quick to restring them. The trick is to curl a little semi-circle in the end of the string where the ball-end is. I use a pen or even a jack plug to curl it around. Then it stays on the pin on the Bigsby relatively easily, especially if you maintain some tension on it with your hands while attaching it to the tuner. I hold the string up tight next to the tuner, measure around 1/2-3/4" of string past the tuner, put a kink in it there and then pull the string through the tuner until it hits the kink. That leaves you with just over one wrap around the tuner with the string which is all you need.