If you don't want to constantly reapply benzoyl peroxide and treat your acne, then I would forget the regimen entirely. The Regimen isn't a cure, (meaning it won't eradicate your acne for good) it's a treatment - and a VERY effective one at that. Again, if you're worried about benzoyl peroxide being harmful and it's too expensive where you live I would consider something else.
If you're going on the regimen just to come off of it, like I said before, I don't think the regimen is for you. It requires lots of time and dedication to your skin. If you want to make the regimen work for you - give it a shot. Try it for 3 months max, and if it works, keep doing it. If it doesn't clear your acne within 3 months then you should quit.
HOW TO QUIT THE REGIMEN:
*if you are clear from the regimen and you decide to quit it, your acne WILL come back, maybe even worse than before. That's just something to keep in mind*
Slowly decrease your amount of benzoyl peroxide as the days go by, and move onto different products. That's how you quit, it's not that hard really.
PS. Remember that Benzoyl Peroxide itself is only harmful if used improperly. ALWAYS use SPF in the summer, and always use moisturizer. If you do that, BP shouldn't be all that damaging. It only increases aging if you aren't moisturizing and using SPF, because it does dry out your skin and make you more suseptable to sunburn.