Search this topic & you will get MORE than enough information to make an intelligent decision.
To give you a quick answer, you will 1) not be able to properly eliminate the low frequency (bass) in an apartment building regardless of how much money you throw at it and 2) you will spend more than $3000 for just the materials alone. Chances are your landlord will also be none-too-happy with you building a soundproof room inside of the apartment, so unless you can practice during the afternoon on weekdays when people are likely to be at work and not sleeping, you may want to invest in V-drums. I live in a townhouse and I have both an acoustic kit and v-drums but I play the e-kit much more just based on the time of day I have to practice/play. You can also get brushes, 'hot sticks' or muting pads that will help reduce the noise on your acoustic kit.
Good luck!