Man braucht eigentlich gar keine besondere Hardware. Man kann auch Google Colab gratis nutzen. Nur muß man wohl alle 24 Stunden neu starten, glaube ich.
Google Colab is a free cloud service and now it supports free GPU! You can:
develop deep learning applications using popular libraries such as Keras,
TensorFlow, PyTorch, and OpenCV.
The most important feature that distinguishes Colab from other free cloud services is: Colab provides GPU and is totally free
https://www.kdnuggets.com/2018/02/google-colab-free-gpu-tutorial-tensorflow-keras-pytorch.html