I'm a little confused by your last posting.
How had you hoped to save money by learning to ride an English seat?
Regardless of the discipline tack, riding wear, and all the gear are expensive.
You should learn a particular discipline because you enjoy it, not because you think it might save you money in the long run.
Yes, if you want to learn to ride a proper, balanced English seat, you'll need different tack. You just simply cannot learn to ride an English seat in Western tack.