Most of our t-hunts are 2M so I use a close spaced 4 element yagi modified for center mount, an old rake handle for a mast, a couple of sections of PVC pipe, a chunk of plumbers strap and an eye bolt to swing the boom. I think I have about $5.00 in the antenna system (the antenna was reclaimed from a scrap heap). The attenuator is another story however...... T-hunting is best done with a team (at least two) it tends to keep the driver out of ditches and obeying things like stop signs.
It might be best if you mentioned what type of antenna you are planning to use and what frequencies.
Bruce