A lot of people have extra spaces in their garages or backyards. What if they could build in-law suites, and carriage houses on their properties, and rent them out. Here is a solution.

254: Manage all social  media messages and comments in one place for Solopreneurs

Vijay Peduru provides one million-dollar startup idea every Tuesday. 
These ideas won't help you build the next Instagram or Twitter, but would help you
create a $2K to $10K MRR(Monthly recurring revenue) business. The goal is to help you accumulate half a million to a million dollars in 3-5 years.
These ideas could be easily implemented without much tech background.