How much does a dedicated server with 128GB vram cost a month.

You can get an H200 (141GB) here for $2,700/mo: https://deploybase.ai/articles/h200-price

I could be wrong but my understanding is that 24/7 dedicated servers are wildly economically unviable. The reason cloud tends to cost less than local today (other than the subsidization) is because you aren't running models 24/7. So like 6 hours of cloud per weekday might beat the yearly cost of building local machines, but it's not in the same universe if you're running 24/7, as evidenced by two months of H200 rental costing more than the DGX Spark this Laptop is built out of.

Less than this laptop.