The longest poke I have taken with a 270 at a deer was 302 yards. I was shooting out of a stock 22" barrel with winchester supreme factory ammo loaded with nosler accubonds. I aimed about 6" high and drilled him, ran 25 yards and piled up.

270 is a great deer round, and an easy to find classic in factory ammo, but the bullet choices are limited to a certain degree as mentioned above. The bullet in the story above was 130 grains, that factory barrel wouldn't shoot 150s worth a flip.

If I was going to build one I would go with at least a 24" barrel

a Jard trigger may be too light for hunting, I have used timneys (~$100) with success on my hunting rigs to get a 2-3 lb pull, but this depends on your style of hunting.

20 moa bases are needed to go really long range, but out to 300 or so you shouldnt need one, I have been putting DNZ one piece bases (~$50) on hunting rigs. I love them. They are rock solid and fit the reciever well, and don't get in the way too much.

I think you will be able to put together a first class hunting rig and stay in that budget