You can actually beat it without a farm, place where you were placing, so on the first bend after the bridge place a trunks (I have cursed + immense on mine) then as soon as you can afford place broly (I have Hawkeye + immense on mine) where,you placed trunks in the video, then place whitebeard (observative + speedster on mine) next to the path near broly when you can afford, then place another trunks where you placed your broly in the video, upgrade the trunks by the bridge until he’s line aoe and then set him to last, then upgrade the second trunks until the upgrade which costs more then 3k, now upgrade broly as much as possible without getting full aoe upgrade, any remaining money on wave 20 u use to upgrade whitebeard