Quick illustration for a Personal Finance App

We are a Fintech company launching a new savings product. We have a list of illustrations/graphics we need created so we can test with our beta users which illustrations/graphics are most effective at getting people to save money.

We have hand-drawn the first couple of ideas and need a professional graphic designer to bring these to life and provide .psd files.

I have attached the first hand drawn drawing to give an idea - please reply with an idea of time this would take you (allowing for a bit of feedback on colour changes, etc). We will then commission someone for this job and if we are happy, we have 10-15 other illustrations we need over the next week or so.

I have also attached a logo for reference