DROS YA OR NAY!!

OK I WAS LOOKING AT A TRUCK I WANTED TO BUY AND IT HAD DROS. IVE NEVER HAD DROS ALWAYS BEEN INTO BAGS BUT I WOULDNT MIND TRYING. NE WAYS I HAVE NO CLUE WITCH IS BETTER HOW HARD MAINTANCE IS, IF THEY LAST ECT.IT HAS ON BIG BATTERY 2 CROME PUMPS THINK 4 DUMPS AND A STREET CHARGER. WILL I HAVE A PROBLEM WORKING ON IT IS IT MORE OR LESS MAINTNECE THEN BAG. (I ONLY KNOW BAGS) ANY TYPE OF INFO AT ALL WOULD BE HELPFULL THANKS