No!  If you intend to have a long term investment in drumming, hobby or career, you may go through a number of transitions, experimenting with different equipment, different sounds, etc.  Some may stick with one setup and never change but IMHO, playing on different instruments is a good thing.  Who knows you may want to go back to the tub for a specific effect some day...   You will want a fairly consistant setup for working through basic stuff but a good portion of the fun and creative part of drumming will come from experimentation and stepping out of the norm.  Just look at the difference between different player's setups - there are lots of possibilities and none are perfect for everybody.  And many players switch between multiple setups for different applications, small/large, V-drum/acoustic, cocktail kit, percussion rigs, etc.... Good luck with the move to a "real" bass drum....

The person who can practice ride patterns on a pot for six months is the person who will do well with drumming.  Seriously. 

A lot of drumming is about having what it takes to put in the hours of practice and enjoy it.  If you can motivate yourself to do that before you even own a kit, you should do great.

I money's really tight, just make it known to everyone that you're looking for a kit.  You never know, someone might have an old kit collecting dust somewhere that you can borrow or get for a song, so to speak.