Minimalist Solar Website Build

I need a clean, fast-loading website that showcases my rooftop-solar services in India and funnels visitors straight to a phone call. The site will have only three pages—Home, Product Information and Contact—so every element must work toward one goal: lead generation.

Here is what I’m after:
• Minimalist look and feel—white space, restrained colour palette and intuitive navigation.
• Three concise product sections on the Product Information page; no e-commerce, just clear specs and benefits.
• Prominent, click-to-call phone number fixed in the header and repeated in the Contact page (no other form fields).
• Mobile-first responsive design; pages should load quickly even on slower rural networks.
• Basic on-page SEO for the Indian solar market (clean URLs, meta tags, alt text).
• Handover of editable source files and a simple guide so I can update product details myself later.

I’m open to WordPress, Webflow or a lightweight static build—as long as it remains easy for me to tweak copy and images. Let me know your preferred stack, a couple of live minimalist sites you’ve built, and a realistic timeline for design, development and final hand-off.