to answer the original post:
1. Crack is available in cheaper amounts, but it does not usually end up being cheaper. Say you buy a $10 rock or whatever (I don't know how much that should be- the only times I've really run across this stuff have been in the ghetto, and there were no weights mentioned). While cheaper than a gram of powder (for me anyway), that rock will last all of about ten minutes maybe, and in my experience (and the experience of all of my friends who have cruised the ghetto on some random whim to do crack), you almost immediately want to do more. It is a very, very fiendish type of drug; as soon as the high is starting to end, you immediately want to do more.
2. Is it recreational? It can be for sure. The high, in my case and in the cases of most everyone I've ever talked to or seen do it, is more like a serious "rush" type of high than the typical powder cocaine high. This rush feeling does not last very long at all, but it is much more intense than just doing a line of powder. When you read people one here mentioning "bellringers," they are referring to this type of effect from smoking rock. It feels very good actually and is much different (for most people) than the effect derived from snorting powder cocaine. It does not last as long, and is immediately followed by an intense desire to recreate the feeling, which people often do continuously until they run out of cash. Cocaine itself is a pretty short-lived high, but the crack high (ime) is much shorter and more intense, thus leaving the user wanting to do more very quickly, and this cycle can repeat itself for any number of hours/days. I guess if you were with some good friends and you all had several hundred dollars to waste, it could be a pretty fun recreational, social thing. Also, if you like to have sex w/ pros, a whole lot of them are addicted to crack, so if you consider banging prostitutes on drugs recreational (and not seriously depressing the next day(s)), that could be another recreational type of crack binge I guess.
All in all, I don't think you'll suddenly become a crackhead because you try it once. You will probably see what I'm talking about with regards to the "fiendish" nature of the drug and why it typically isn't considered the same type of disco-party drug its powdery sister is. You will probably notice the short-lived but much more intense rush-type high that most users (though not all evidently) tend to feel, and you will likely gain an understanding of how easy it would be to just sit in a room and shell out a few hundred dollars every few hours or whatever for a couple of days (or longer for some) to try to maintain the initial high. Some people seem to love it, but I don't know any people in real life (besides the people in the ghetto that help u find it/try to rip you off/try to get in on it with you for helping you find it/etc.) that have actually turned into regular crack users. Clearly it happens, and I can see why, but it has not happened to anyone I know well.
If you like coke because you like to party and go out and meet girls/guys, and dance all night, or drink better at night, or stay up late, etc., crack is not going to be the same type of recreational drug, in my experience. It is a mind-blowing initial high (in my experience) followed by the desire to do more crack, and no desire to go do any of the fun partyish type stuff u might do when you do coke. Again, this is my personal experience and obviously others differ.