sounds like you are catching on quick. this is a very expensive hobby and its better to buy once and buy right then twice. I have been doing this 5 years and am out to 600 yards now. I am finally having a barrel put on my rem700 and getting stock. using an burris scope for now but am saving for a nightforce.
one way to get started is to buy a Remington 700 in the action length you want to end up with. you can get the SPS models for $550 used sometimes in very good condition but you have to keep your eyes open. lots of times, the .25-06 is a good one because lots of guys don't think of it as a good round because its not popular, and so a pawn shop will be tired of hanging on to it and get rid of it. I got mine for $500 a few years ago shipped to my FFL. if you want to hunt at 1000 yards, you are going to want a long action probably not a short action so this might be a good start for you. you can then put $400-$500 into a burris or Nikon and spend $20 on springs to get your trigger down to about 2.5# and you have yourself a 500-600 yard rifle that you can do lots practicing.
good luck.