A little help: initial idea validation

Hi, my name is Patrick, I would like if you can help me validate a product idea.

The question:

How much would you be willing to pay for a specialist in UX, Ui, Marketing, Copywriting, information architecture, visual design, branding, etc, answer 5 questions about your product-service (either mobile or desktop app), in the form of a technical or business review/analysis?.

If you want to help me a little more, you can expand your answer:

What qualifications and filtering would you expect from the experts?
Would you like them to attach graphics on their responses (screenshots, videos, etc,)?
What other types of experts not mentioned would you like to direct your questions to?

It's simple I just want to know if any of you would be willing to pay and how much would you be willing to pay.

Note: sorry for the bad English. It is not my first language but I adore this community.