horizontal units

hello all i am trying to get some houses that are right under the hill that our main cluster is on and i want to set up a bounce from a ridge that is visable to under the hill.

i have a 900 omni and a 2.4 cluster up top all moto gear and all vertical i think.

what i want to do is set up a bounce using horz gear. i am just not sure how to do it.
i have a sm that is on this ridge that services one customer and he has agreed to be used as the bounce

what ap would i use and what antenna.

any suggestions would be appreciated.