What's best opportunity to get higher income especially for single moms?

One friend of mine works as a stay-at-home BPO agent and does a couple of rakets in between. Tiring, yes. But I think it's all the more worth it as she can see her kid's milestones and everyday routine while she earns money.

I see a lot of Facebook ads about online tutoring if you like to work at home. Lots of them offer five-digit salary, and maybe you can get extra for extending working hours.