I would work with an electrician that you plan to hire and show him what you are doing so you don't do something that has to be redone when he shows up. Anything around a hundred feet I prefer to use my metal fish tape. Push fish tape in and pull the wire through. I have done about a hundred feet of 4/0-4/0-2/0 service cable with my fish tape on a straight run fairly easily.
With Electricity there is the right way to do it and the dead way. Just because it works does not make it safe.