Hey client, nice seeing your project proposal.
In the past, I've worked on various form-based data-input projects alongside web crawlers that capture data into PDFs for future audit - the most recent being a corporate intranet domain (with over 10,000 websites) that had to be screenshot and knit into a PDF for audit purposes. That one went really well and the project got nominated for some sort of innovation accolade.
I reckon it's a basic Material Design-themed app that captures images and form (textual) data and exports one PDF per vehicle (would require some clarification on this). Further, once compressed and exported, the PDF could be shared over an external intent (on Android) to any PDF-capable app.
If that's about it, I'm pretty confident about completing it within 3 days.
Looking forward to working with you!