at someone's disposal
US /æt ˌsʌm.wʌnz dɪˈspoʊ.zəl/
UK /æt ˌsʌm.wʌnz dɪˈspoʊ.zəl/

1.
available for one to use whenever or however one wishes
:
•
I have a car at my disposal for the weekend.
•
The company has vast resources at its disposal.
available for one to use whenever or however one wishes