it might just be me but the bit about big scoopey jump and bsja would put a few people off, as you said you have had soundness issues i am guessing she has been off jumping for awhile, as a confident rider if i was to look at the ad i would not of called just because of the jumping bit, dont get me wrong i jump, do dressage and xc.
i would definate angle it towards the gaining experience so stables mucking out, and all the dirty stuff that comes with owning a horse especially stuff like lifting rubber matting yuck!!!!!!!