Toecutter: Keep in mind there are two kinds of kits.
The Lyman, T/C, Cabalas, Pedersoli, etc. kit is an Assembly Kit, where you sand, blue/brown & assemble it. Everything is preinletted & fitted & you will have very little fitting to do. (These are the $200 to $500 range)
The Tracks, Tip Curtis Frontier Shop, Pecatonica, Chambers Flintlocks, Dunlaps Woodcrafts etc. kits are Builders kits. They have all the parts to build a rifle but with much work involved to get the parts to the point of assembly. Dif. kits take different amounts of skill. (Most of these parts kits start at $500 & go to about $800. depending on style & wood grade)
If you have never bult one, I would start with a Lyman GPR kit. Then go to a 90% inletted kit next time (if the first one went well) then on from there.
Good luck
Birddog6