I've used 'ungulat' on one horse and it seemed to help a lot. Didn't cure the problem, but the horse appeared to have a lot less discomfort walking. Took a few weeks.
There are a number of sprays (e.g. silver spray) which will not only disinfect the wound, but also repel insects. Talk to your vet. This could be used in addition to a fly sheet (double protection) or perhaps instead. I agree that you need to keep flies off unitl the wound closes. If you buy a...
Maybe this reference (http://www.laminitis.org/laminitis.html) will be helpful. It discusses frog supports and also the need to ensure that supports are not too thick. Also discusses a number of surgical options --- too complex for me but in your case I think it might be worth plowing through...
If your horse gets colic again, you may find this colic guide useful:
http://wowhorses.com/horse-colic.html
It explains what colic is, what causes it, how to prevent it and how to treat it. Hope you find interesting / usefull.
In terms of both parts of the question (number of items, cost per month), the answer depends on many variables. Here is a potential list:
- Stall
- Bedding
- Hay
- Food supplements (e.g. grain, museli, mash), depending on the horse's condition and use
- Salt, minerals
- Farrier
- Vet (this can...