Dan,
You are asking a wide variety of questions here
The mass production guns such as CVA, T/C and Lyman are often called entry level guns. The T/C and Lyman have coil spring lock. The Lyman actually resembles the Hawken closer than most "Hawken" kits, but are not as close as Don Stith's parts. Some older CVAs had great barrels, but my experience was that their locks were poor. Parts wore out and springs weakened.
I have 2 Lymans and several T/Cs and all of these are pretty good -- for the money. However, I moved on to mostly full stock guns that are more correct and earlier in styling. I also have parts to build more correct half stock percussion guns.
The next step is what I see as modern production method guns that are something of a compromise. These often have milled ramrod channels and other labor saving methods used which some like and others do not like. These guns often get glass bedded which some people do not like, but I do like. TVM (Avance and Garner both) Jackie Brown, Tip Curtis (I think -- I do not have one of Tip's yet) and some others fall into this category. You get a pretty good gun that was built according to your measurements and with features and to your degree of finish. There is a waiting period for these because this is all pretty popular. The price that you mention might put you onto an in the white rifle or kit depending upon the options desired. You would not be too far from getting a Chambers kit for that money.
You then have some premium builders such as our own Mike Brooks or Eric Kettebburg who produce a work of art that was made through generally more period means aside from the barrel. There is a lot more artwork involved in these.
Look at these closely and you will likley notice reasons why these are higher priced. On the other hand, the reason might just be that one asks that price and someone else pays it. :hmm:
You are getting what you are paying for there.
You should think about the gunbuilding process; assess your skills; cultivate your tastes; write all of the aforementioned items out; study sources; select a source and then discuss your vision of your end product with that vendor so that you both understand the expectations, money and timeline.
Good luck!
CS