regarding the price: I am in harrisburg pa. In the last year, I've leased a horse (half lease on paper, but a full lease in practice) for $100. this included all care done by owner, including stalls, feed, vet, and tack. My portion was $100 a month plus 1/2 of farrier bill every 6-8 weeks. It gave me unlimited days and hours of riding on sixty acres, with trail rides out with the owner occasionally.
I looked at and rejected a lease for $125 for unlimited hours and days of riding on miles of trails. Full care by owner. My only reason for rejecting the deal was that I wasn't fully satisfied with the level of care given.
What I have now is a lease on a 8-year-old quarter horse that is nearly dead broke, traffic safe, and kind. I pay $150, and while it is a half lease (three days a week, 2 hours a day), in practice I ride whenever I want. I can ride on some limited trails on the farm, and I can road ride within the nearby community. There is an indoor arena and an outdoor ring. I also have access and encouragement to ride the owner's other horse, a kind, though spooky TB. Great facilities at this place, and I wind up riding six days a week for up to four hours a day. So...great deal, too.
My point is that at $200, you need to be offering a great deal and be clear about what the lessor is getting.
Talk up her trail ability, if she is trail safe, and let the lookers know how much riding you feel comfortable offering. I'd be interested if she were local, but probably not at $200. I wouldn't remove the intermediate requirement if you strongly feel that is what she needs.Good luck.