Hey Commeaupj,
UDK is still available: Unreal Engine 3 Features
However it is encouraged that new projects start with UE4 (see the “Transitioning from Unreal Engine 3” section of FAQ: Häufig gestellte Fragen - Unreal Engine).
Also, if cost is an issue, you can pay $19 once to get access to UE4 and then cancel your subscription. This will let you keep and use what you have, but you’d need to pay again to get any updates after first month.