Family-friendly accommodation in Tokyo for a budget-conscious parent?

Hey fellow travelers! I'm heading to Tokyo with my two kids this November to catch the beautiful autumn leaves. I'm looking for a cozy, family-friendly place to stay that won't break the bank. Any recommendations for affordable hotels or traditional ryokans that cater well to children? Also, any tips on how to save money on accommodation in Tokyo during the peak autumn season? Thanks in advance for your advice!