if all you know about driving a sidecar is what you have read, and you are driving a home built rig your miles per day estimate is a bit optimistic. Links will reduce steering effort and fatigue but will require more attention to what you are doing, not less, because the steering will not only be easier but quicker as well. Stock forks will work fine, a fork brace and/or wider front tire will help control flex, but you may find they are quite fatiguing, particularly if you insist on high mileage days.
the Red Menace
"I know this twatwaffle whose ego is so big he doesn't have room to pack anything else on his bike. Sad, really." http://youtu.be/GwZlrWPSTHg