Medium distance wifi boost advice
I want to throw wifi to a house that is roughly 100 yards away from a Linksys router. Using upgraded omni-directional antennas (non powered), a typical laptop barely sees a signal at the secondary house and drops the connection easily. I want to add a wireless bridge/AP to the receiving house that will catch a directional antenna set up at the primary house. The signal will cross a field that sometimes has corn growing. Line of sight should be right over the tops of the corn, but it could be obscured slightly during certain times of the year.
Right now I am thinking that I can use the Linksys router I already have, add a WAP, and equip both with homemade cantennas. Another option I thought about doing was using 2 Hawking out door directional antennas to communicate, but that will push the budget over 200 dollars.
Any suggestions on the gear like the WAP and antennas or even advice on a better way to set it up?