Throughput? Programming throughput or I/O? You should be able to saturate the bus. It's all dependent on what kind of processing takes place on either end.

AWS offers FPGAs for rent [1] starting at around 1.50 USD/hr -- perfect if you want to dip your toes in without a huge capital expense.

[1] https://aws.amazon.com/ec2/instance-types/f1/