Best cloud AI resource for training Tensorflow

I have been training small Tensorflow models by running them in PyCharm, but am now reaching the point where doing this takes too long.

I would like to start using a cloud service (paid-for if necessary), but one that integrates well with using PyCharm for development. e.g. Deploy from Pycharm direct to cloud service.

I have tried using Google Colab but it is too awkward to get Python files and models copied to Google Drive and then mounted in Colab. Also, Colab has runtime limits and keeps disconnecting.

What is the best service to use to run neural network training and hyperparameter optimisation where this could take several days? 

Thanks for any suggestions.

Julian