If your goal is to avoid being banned by Facebook, use a 4G/5G mobile proxy whenever possible. They change the IP naturally and look like real cell phone traffic — hard to track.
If you want something more affordable, a quality residential proxy will also work, just don't settle for a bad provider.
Good options:
AirProxy (very stable)
Soax
ProxyEmpire
Bright Data, if you have the budget
Avoid cheap datacenter proxies, especially if you use multiple accounts. And never use the same proxy for more than one account — each profile has its own IP.