Can I dodge every promo on Bronze V and win every game so MMR will take me to the Challenger?

Yes. If you're good enough to reach challenger.

No eventually your mmr would start gaining 0 points

Its a lot harder to solo carry games in Bronze than you think. You will be playing with 4 other random players, half of which will be intentional troll and the other half will be horrible.

Good luck, however.

Your MMR would still end up matching you with Plats and Diamonds even if you're Bronze if you did that, so you wouldn't be able to solo carry.