Sorry, but I don't think a golfer could drop 10 strokes with just a $1000.00. Maybe if she/he had a gift to swing a club, a $1000.00 might be enough to fine tune an already solid swing, and could possibly find 10 strokes.
Properly fitted clubs from a qualified fitter is going to run a few hundred dollars. After that, more than a few swing lessons from a "qualified" swing instructor would put a golfer way past your $1000.00 limit when added to the club fitting, and purchase of those clubs.
Shawn Humphries took Troy Aikman ( a gifted athelete) from a 15 hdcpr to a 3 in a year or so. I bet he paid Humphries way more that $1000.00 to achieve that low number.
Living in Vegas i might invest the $1000.00 in the "Mega Bucks" machine, and hope I win enough money to be able to afford to lower my hndcp by 10 strokes.......lol
Now to really answer your question, I would probably spend the $1000.00 bucks on a set of fitted clubs, and some premium golf balls. Then be happy with lowering my hndcp by 5+/- strokes...............FHs