Praise be to Allaah.
There is nothing wrong with you doing the program mentioned
in the question, so long as you write in the advert “Profits raised by this
project will go to support the work of the da’wah office”. Thus donors will
be aware of the situation and will understand that you are going to make a
profit from this program, and that this profit will support the work of the
da’wah office.
You do not have to tell donors exactly how much the profit
that you are going to make will be, because the one who is taking part in
this program is doing so with the intention of giving a charitable donation,
not with the intention of entering into a business transaction, and it is
known that charitable donations are usually based on tolerance and not on
competition.
We ask Allaah to bless your efforts and benefit others
through them.
And Allaah knows best.