Likely yes. Though there may be few ways to land the core booster: 1. Expend side-boosters to save enough fuel in the core for the entry+landing burn. 2. Land

Likely yes. Though there may be few ways to land the core booster: 1. Expend side-boosters to save enough fuel in the core for the entry+landing burn. 2. Land side-boosters on drone ships instead of flying back to land. First option is likely the least favorable one, since two side-boosters combined price may be higher than the single core. Even though the core itself is likely more expensive than a single side-booster, since it caries the load of the payload plus side-loads from both side-boosters. Second option may be complicated logistically due to a lack of drone-ships. Landing three (or even two) rockets in the ocean was never done before.