Note, that paper provides environment for AWS FPGAs, which you can rent on per-hour basis. As for cheaper FPGAs, the paper notes that the bottleneck is the siz

Note, that paper provides environment for AWS FPGAs, which you can rent on per-hour basis. As for cheaper FPGAs, the paper notes that the bottleneck is the size of on-chip memory. So I doubt it will be easy to find cheaper model to reduce costs. Another hidden fee would be Vivado and Vitis (tooling) licenses, which you need for most upper-end FPGAs.