Complex sentence: Eventually, Tingatinga's works became very popular among european residents and tourists, to the point that he was able to work full-time as an artist and founded his own painting school in Dar es Salaam, the Tingatinga Society.
Split into simpler sentences: Eventually, Tingatinga's works became very popular among European residents and tourists, so that he was able to work full-time as an artist. He later founded his own painting school in Dar es Salaam, namely, the Tingatinga Society.