Haystack does not really compare to huggingface as they are directly using it as a library, it's more of a layer on top.
Serving a search system for 100K lines (short document?) is trivial on a single CPU machine, so the costs will be low.
For training if you stick to fine tuning and your dataset is relatively small (<10M) you could use collab with a free gpu. Training time really depends on your use case, the simplest classification may be handled in a couple of hours.
Haystack does not really compare to huggingface as they are directly using it as a library, it's more of a layer on top.
Serving a search system for 100K lines (short document?) is trivial on a single CPU machine, so the costs will be low.
For training if you stick to fine tuning and your dataset is relatively small (<10M) you could use collab with a free gpu. Training time really depends on your use case, the simplest classification may be handled in a couple of hours.