We have a 10 acre tract, so we have even less pasture ground than you have. I'm guessing only about 7 acres of it is fenced in. I have 3 horses on it, and I buy around 12 round bales each year. I usually have enough to last me until the next cutting, so it does okay. I also have a horse that is a very easy keeper and doesn't eat as much. I typically always buy brome, but it's now going for $85+ a bale. This is the first time I decided to buy prairie, and only because the farmer told me it was an old brome field that mostly died out and he over seeded, so it is a mixture and I hope they like it. I paid $65 a bale for it. Check on craigslist, you'll see TONS and TONS of hay! But it may not be the prices you want. I started out buying 12% sweet feed (yes, it has molasses in it) at the CoOp. However, their prices went up to right around $11+ a bag. (depends on the month, it could be as high as $13+) I then switched and started buying my 12% sweet feed (it has more pellets in it, but has the same protein %) at Atwoods and it is only $8+ a bag. Cut my feed bill by a LOT. I spend about $50 a week, but that is because I have a horse right now that is so old, she is becoming a very hard keeper. I feed her the x-large plastic red coffee cans-- she gets 4 cans a day, the others get 2 cans in the summer. But in the winter, they get 3. And I top my older mare by another 1/2 since she won't eat any extra, she just stops. So my feed bill goes up a bit because of the winter.
Right now, I'm not doing much of any riding at all. My riding has gone down by a LOT since I had kids. I hardly get a chance to go out there because of them. And you'd think staying at home with them, I could ride. But when they are babies, they need you pretty much constantly.. and now, they are getting better, but with 3 of them, still hard. My best hope is to plan events or go riding in the evening here at the house when my DH gets home and my neighbor can go down the road with me. I used to be a member of the South Central Kansas Trail Riders Association for about 15 years. I let it drop since I couldn't seem to get away. It's frustrating to me, but that's the way my life is right now. Our trail rides always consisted of water crossings, gulleys, etc.. One of the reasons why I like getting out to the lakes because there is more varied terrain to ride on. We have a horse park near by I get out to on occasion, which is fun. But yeah if anyone wants to try to meet up at say-- like Kanopolis this Fall, I'd be in for that. It's about a 2 + hour drive from me, but well worth it. Or there is another lake up north that has good trails-- up by Lawrence, I think. Kanopolis has nice corrals you can put your horse in, and electric at the sites. Even though I tent it, I always buy electric so I can plug in a fan or heater, etc...