In order to become better at climbing, you need to work on strengthening your fingers all the time. The TRANGO Rock Prodigy Hangboard can be set up anywhere for training. With 2,3, 4 finger holds, crimp grips, and pinch grips with bumpers, you can work all the right muscles.
This hangboard has various deep edge rails to simulate deep holds and micro-edges. Costs under $190 at this time.