Help! I need a babysitter!

We are moving to the Dallas area. Needing a babysitter 3 days one week and 1 or 2 the opposite week from ~7:15 am to ~1:00 pm. I have 3 children ages 19 mths, 3 yrs and 5 1/2 yrs, however the 5 yr old I will pick up after only about an hour and keep with me.
Thanks!