Looking for a Profitable Project Idea

I'm capable of building websites, creating integration systems, and have some IoT skills. I have around $5,000 in savings and three months free before returning to university. I'm looking for a project idea with low maintenance that I can develop and potentially generate an income of $500-$1,000 per month. Ideas like a geocode API or WhatsApp integration have crossed my mind, but I haven't settled on anything concrete. I would greatly appreciate any suggestions and guides for a project that could realistically help me achieve this goal. Thank you for your assistance!