We have access to small and large turbo props that we could provide to you to use as often as you would like for lease or I could assist you in purchasing these aircrafts. A perfect match for what you are looking for is the Beech 1900 commuter which seats 19 exatly. If you needed additional seats the Embraer 120 seats 30.
Please call me to discuss your needs further and I can find you the right aircraft and the right option for what you are looking for. You can reach me at 212-446-9037 ext 5131 or email me at bvelelis@bluestarjets.com.
Thank you,
Brian