An address for data collection
Volume takes more addresses. It does not take a different kind of address.
Collecting pages in quantity runs into the limit of lookups the destination accepts per IP. Past the limit comes a block or a captcha, and the address is not at fault.
How to size it
Measure how many pages per hour one address delivers with a valid response. Divide the total you need by that number. The result is the quantity, with spare for the ones that fail during the day.
Spread across different blocks. A hundred addresses in the same block get blocked all at once.