By full board do you mean with training included? Out in California, full board typically means all care, turnout, blanketing, supplements, etc. but training is another fee. If that’s the case, then I think $1000 is way too much - full board here usually runs from around $500 to $800.
If the $1000 includes training though, then that’s pretty reasonable. Keep in mind that either way, equestrian costs tend to be higher on the East Coast.