Saying "I'm going to be + gerund"

[Tycholiz]

How do I say this in the context of "I'm going to be helping them clean the house"(periodically)

Would this be: "iba a estar los ayudando limpiar la casa", since it is an ongoing action? or would it be something more like "voy a estar ayudando..."?

Appreciate the responses!

[aleCcowaN]

[Cuando atardezca] Voy a estar ayudándolos a limpiar la casa (non-periodical)

This structure doesn't fit well with periodical events. Better "les voy a ayudar a limpiar la casa (de manera regular)"

[micho]

Voy a ayudarles a limpiar la casa.
Voy a estar ayudándoles a limpiar la casa

Yo normalmente traduzco I'm going to... por "Voy a..."