Not trying to burst your bubble here, but you need to be a little more realistic with your intended use. A rifle built for target shooting is not going to be a gun you want to lug around from stand to stand during hunting season. My advise would be to be honest with yourself and decide which of those three things you plan to do the most or which of them you want the rifle best suited for and then build it specifically for that purpose. Trust me, you'll be a lot happier in the end as you'll have a rifle that excels in what it was built for rather than a rifle that really isn't ideal for any of the three roles you're using it for.

And with all the cheap bolt-guns on the market these days (Savage Axis, Ruger American, Remington 783, Marlin X7, Mossberg ATR, etc) you can get a second rifle for about the same money as you'll spend on a quality aftermarket stock.