Hey, i train most of the clothes on 4x Single Transformer.

Here are the Settings for Ostris AI-Toolkit

network: type: lora linear: 128 linear_alpha: 128 dropout: 0.25 network_kwargs: only_if_contains: - transformer.single_transformer_blocks.5.proj_out - transformer.single_transformer_blocks.8.proj_out - transformer.single_transformer_blocks.9.proj_out - transformer.single_transformer_blocks.10.proj_out

The Size could be also smaller if u chose a lower Alpha.
But on single Transformer LoRa u can also use high Alfa and still have small size ;)