[Yummyboo]

DVCAM is compressed when it is shot, there’s no point of using SDI capture on DVCAM footage.

But if you really wanted to do it for some reason, a used sony DVCAM decks with SDI option like DSR1500 would cost you around 6K
https://www.tvprogear.com/used-video-buy.php?desc=515

also you need some sort of raid storage for unpressed SD