This way you can find out what works on your farm, in your rainfall area, with your seeding conditions, while you keep farming the rest of your land the way you are used to. He can advise you of what, when, how much, how deep, etc., etc., before you start and while you are doing it. Some of the best advisors I know are people who have been direct seeding for a lot of years and have made a success out of it. Many times, they can be hired to custom seed for you the first few years till you are comfortable enough to buy a drill of your own. Get the green volunteer and weeds dead 2-3 weeks prior to planting.
Timing is everything.
Spray Roundup, seed, spray herbicide, whatever, but do it in the proper window to insure good results. They are very important when it comes to making the direct seed systems work. Yields are often cut back because the seed was placed too deep, or at too low of a rate to allow for proper stooling. The right rotation will help eliminate most of this risk. Be sure you are working with a fertilizer supplier who understands and agrees with what you are trying to accomplish and will give you the agronomic help you need to succeed.