Complex sentence: By 1905, Tillings had 20 motor buses, but still owned 7,000 horses, kept in 500 stables to work their 250 horse buses and for hire to other companies and individuals for hauling goods vehicles, cabs, and carriages.
Split into simpler sentences: By 1905, Tilling had 20 motor buses but still owned 7,000 horses, kept in 500 stables. The horses worked the company's 250 horse buses were hired to companies and individuals for hauling goods vehicles, cabs, and carriages.