I don't think you can get a decent starter set for $25. Heck, a 30ml bottle of juice is going to be half of that. You're just throwing your money, and likely, after doing it, you'll be saying "Well, I tried vaping, but it sucked".
I've saved a ton of money since I switched to vaping, since I'm not smoking 3 packs a day. The fact that I used to be a heavy smoker makes it easier for me to save than someone who didn't smoke much. I don't buy a lot of new vape gear these days, because I have good gear already. But when I first started vaping, I'd use one thing for awhile, and it wasn't quite right, so I'd try something else, move up the ladder a bit, get something a little better than I had before. I wasted a lot of money that way. Eventually, I bought a used Provari. Stick a good tank on that, fill it with juice you like, and you're set.
$25 is going to get you the equivalent of a gas station disposable ecig, and chances are, you won't use it for long. I'd really recommend against it.