In my area there is hundred year old homes 3 family for like 150k Newer ones usually are about 280k I’m trying to get 10 of these What do you think will make me the most passive money in the long run?

Passive money will probably be about the same if you repair the old homes to like new finishes and accomodations. Unless your purchase and repair costs, to bring the property to the same market rents as the new, are less than the purchase price of the new homes. The answer to this will be found in building two proformas. Maybe try the calculators here on BP to model the two. It is time for some analysis paralysis. LOL

Good Luck!