I can't figure it out why you want to do 2k build if there are n/a drift cars around that can be bought for 1-1.5k.
For 1k

, yes one thousand my friend is selling his 535i that was in prodrift few years back (well, stickers are still there) full cage, extinguisher, killswitch, bbs wheels, wand, pins all round, sparco seat, 4 point wide harness, all lightened up with the help of Mr Angle Grinder, doesn't look rough apart from missing rear bumper (need to be refitted) due to my friend being a bit carried away and having an off in goldstone last week.
I drove it and it's great for beginners. I felt really safe in it due to size, weight and huge cage. First time it was down on power, 2nd time it was good but it could be much better if I could get onto someone with sensors.
My s13 will be around 6k euro when finished but it's a different story as it will be a one-off twin charged build. As till now it cost me 1700 euro