The fun (supposed to be fun)thing about working with traditional guns is that the questions never stop! That is half of the joy of this hobby/obsession. I know this is a common question so you might read the excellent archives on this site. You have already gotten good advice from the guys already posted. However, I would like to throw out a couple of additional comments since you asked and I have had 2 cups of coffee...One question for you is do you want to go through the process of building the rifle? Does that interest you or do you really just want to shoot/hunt? Building takes tools, time and patience. To spend $400-900 on parts alone and putting a deadline on the project is probably gonna add a bit of stress to your life. You did not mention if you have built before, so if you are a first time builder, that also will add time and patience. That stress may show up on your gun building. Now get rid of that deadline, and most of that stress turns to extreme JOY!
I am proud to say I have brought two people (and a third on the way) into muzzleloading. My brother wanted a good inexpensive gun already finished. we looked around and handled a few, and he ended up with a GPR percussion. He loves it! It has the handling and original look that he wanted, and it shoots awesome-very accurate. My other flegling, is a friend who is like me, (opinionated & stubborn) didnt want a percussion, and wanted to get parts so he could assemble his own gun. We are lucky to live near TOW so I took him to the shop. He was rightfully overwelmed by the decisions he had to make on the spot. He ended up with a Leman
parts set for approx $600 with a grade 4 maple upgrad that TOW graciously threw in because of stock backorder. As we were leaving the store he said "well I should have this done in about three months" The TOW guy said "you better not" and I said that is unrealistic. Anyway, I met him last nite to go over his progress with the gun and he is 5 months into the gun and he still has a decent amount of work to do on it, and he works alot on the gun.
However, He is estatic about the process and is having an awesome experience with the gun. He is already talking about the next one. He has forgotten about his "deadline" and is having FUN!
I think he did a great job on the gun for a first timer, and am proud of him and his skill building. His next one I am sure will be even better. So you asked for a suggestion, hunt this year with another gun as others have stated, get rid of your time table, buy a quality kit/parts, and have FUN! Sorry about the long wind typing
Dan