BTW isn't it clear from the SSR specs how much current it draws?
The input terminals would draw what the internal LED current limiting resistor draws at the voltage you drive it at, minus the LED's voltage drop. I would think around 10ma at 5 volts would be a reasonable expectation. You could always just wire the input from the +5vdc and ground pins and measure the current draw with your digital multimeter. You do have a meter? all Arduino people need one!
The biggest concern with these higher current AC SSRs is mounting them to a good metal heatsinking surface if you are going to try and pass full AC rated current through their output terminals.
Lefty