Dreambooth extension for automatic1111 just came out. Can be run on CPU even. Haven't tried that extension myself yet, but I have followed a youtube video last week and I trained it using a colab in a few minutes (of training - getting the hang of the whole process was maybe 20 or 30 mins including watching the vid?). I think dreambooth is already perfectly within reach of regular users, and is already being used for... ehem... questionable purposes that took 1000's of images and days and days of tweaking and training for 'traditional deepfakes' just 6 months ago. The pace of advancement is breathtaking, it's literally impossible to keep up even if you spend 100% of your time on this.