"When will we start making money from this" is maybe a better question.
"Is this something worth investing more money and time in?" is maybe better.
If you're "buying a thing" then "what will it look like and when will it be done" seem like the reasonable questions.
"If I were buying a car," "if I were paying you to build a deck," etc.
What if software development is nothing like buying a thing?
What if it is a partnership to build a new business endeavor?
How would this change your mindset, your questions, your approach?