I've spent alot of time thinking about this, and I've concluded with this:

Hire local people minimum wage to learn and teach each other coding structured around your company's codebase. Once they get to know the basics, have them work on your company's open source projects. Identify the ones who actively help others and convert them as a full time software engineer.

It takes an average person about 1 year to learn enough basics to contribute to a codebase, and paying someone minimum wage only costs about 30k / year so it works out financially on both sides.