Lots of loaded questions. LOL
1st) Cost. A 'fullblood' (be careful in Boers. Purebreds are bred up percentages that have reached a certain level of blood to be considered 'purebred' but are NOT fullblood. 100% boers are fullblood, and have never been 'bred up') anyway: fullblood doe costs vary. You are saying 'show' doe... be prepared to spend MAJOR dollars in most cases. For a weaned doeling with show 'potential' you could spend anywhere from $500 to unheard of amounts, I've seen some listed at (and sold for) over $2500.00. For a proven show doe you are easily looking at $1500 or up to the sky is the limit on price.
For a good, nice confirmation, no major faults fullblood doe again there is great variation. I just bought a very lovely, well put together doe only 2 years old, proven mother, probably would even do well in the show ring, but she would take major work in the handling area, lol, for $250... take my word for it it was a steal. The more common average is 500-1500 ... but you can find deals, just be sure you know what you are looking for, and what to avoid. I'm afraid that might take a little longer to list but you can find out alot about what the standard is, and what is disqualifying, etc, at abga.org under their standards section.
Are there plenty of shows?--not as many as dairy, but there are. Depending on where you are in the country the number of shows will vary, but they seem to be increasing as well.
More money... just like in dairy, if you show, improve your stock, build a reputation, the costs for your animals as well as the demand for them go up, but I guess at THIS POINT IN TIME, I'd say, yeah it's possibly a higher money market to a degree.. that has a lot of danger in it too though, lol, any time you are deciding if an animal is a 'cash crop' you have to take into consideration that the market can fall apart at any time for various reasons.
Easier to care for... in terms of not having to spend the time milking yes.. in terms of as goats in their health care go... they are exactly the same. LOL
Breeding half/boer does and dairy does to a fullblood buck is definately worthwhile. I have a lot of diary does, and x-does that I breed to my buck. Their kids grow out really well thanks to the better milk supply of the diary does, and there are plenty of classes at the Boer goat shows for percentage does as well. (YOu can also find out the 'standard' for percentage does on the abga.org page).
Stud fees vary, but you'd really be best off buying yourself a nice fullblood buckling. (If you are interested in showing, and raising show stock, and replacement does, ALWAYS buy a registered fullblood buck--and of course, it stands to reason you should get the very best bloodlines and conformation that you can as well.)
Hope that answered some of your questions, at least from my point of view.
