I'm a first-time horse owner, and I pay (gasp!) $850 a month in eastern Mass for feed 2x/day, unlimited hay, a nice stall (10x14), all-day turnout and indoor/outdoor (plus access to lots of trails). What's more, this is the best price I could find that has an indoor and an outdoor (cheapest for only an indoor, which seems like a must to me in these winters, was $750 and they didn't have any stalls, plus further from Boston where I live.)
Reading this thread made me jealous! I pay more for Ada than I pay for my rent
but it's so worth it!