Complex sentence: The Party People was originally a home based family business founded by Mala Salakas and her father Peter Nikolas after their home based clown hire business became too large to run from their house.
Split into simpler sentences: The Party People was founded by Mala Salakas and her father Peter Nikolas as a home-based family business. Their previous venture, a home-based clown hire business, became too large to run from their house.