Make money online: YES

A window cleaning business can be quite remote-friendly as the work is often done at clients' locations. However, there may be some in-person requirements for initial client meetings or training sessions. Feedback on forums like Reddit and Twitter generally praises the flexibility and potential for profit in this side hustle. The success of this business can depend on your location in terms of access to clients and local competition. Time zone differences may not be a significant factor unless you offer services that require specific scheduling. One red flag to consider is the physical nature of the work, which may limit your ability to scale without hiring additional help.