An upside is that no fee is applied for exceeding your credit as long as you bring it back within your credit limit within a reasonable time. You can only use this card on QVC purchases, and as with many store credit cards, no cash advances or balance transfers are available. Returned payment fee is $29. Late payment fees will depend on the size of your balance, and vary between $15 and $39.
If you may want to set up a Dressage arena inside your regular arena, that requires more length. A small dressage arena is 20X40 meters (or about 66 feet by 132 feet), a large dressage arena is 20X60 meters. A standard size competition arena is about 100'X200' and is large enough for full jump courses and other uses. Also consider the fence material.
For a stall to house draft breeds, you should probably plan for 16 feet by 16 feet at a minimum. If you own warm-blood types of horses such as Hanoverian or Belgian Warmblood. a good stall size is 14 feet by 14 feet. If you own a hot-blood type of horse such as an Arabian or Quarter Horse, a good stall size is 12 feet by 12 feet. Ponies and miniature horses and donkeys are adequately served with stall sizes ranging from 10 feet square to 8 feet square. If you breed, and own stallions or mares, the stall sizes will need to be larger.