Hi. Mine is a 16h eventer that we don't actually compete anymore. We don't keep him at home so there is an additional cost of full livery (£90 a week) that you won't need to find, but if you stable the horse you will need to pay for shavings/other bedding at £10 or so a week and if you feed him hay and dry feed that will be around £6 to £10 a week depending on what and how much you feed . you will need some kind of insurance by law for public liability, but can get this third party and cheaply via the BHS and some insurance companies. I pay £500 a year in insurance for him to cover him for use, loss of use all accident/injury/illness and public liability with pet plan equine with an excess of £50 His shoes are £60 every 5 to 6 weeks as we do some road work as well as school work and his hoof grows quite quickly and needs regular trimming. Wormer is £16-20 every 3 months but it is often a good idea to rotate wormers to reduce resistance and so you can pick them cheaper if you buy what is on offer. We also buy a joint supplement for him at £60 for 3 months supply and biotin to help the quality of his hoof growth (typical thoroughbred feet) at £13 for 2 months worth, although we used to feed farriers formula or formula 4 feet, which was more than treble that and the biotin seems to do the same job at a much reduced cost. On top of that is the dentist once a year at £50 for a basic tidy up, his flu vacinations at £40 a year and either new rugs or rug repairs and waterproofing which ranges from £25 per rug for a wash and reproof to as much as you want to spend on a new set! Obviously you can get good ones cheaply second hand, but watch out that they are still water proof or you will have to pay on top for this. You can buy water proofer to do your own in the washing machine but this is still between £15-20 and a thick rug with a neck for a 16h horse does not fit the average machine. I can't do a decent clip, so I get someone to clip him for me at £25 twice a year. With new tack, visits from the saddle fitter and vet/farrier treatments for a few cuts and bruises, a part cast shoe that punctured his frog and abcessed etc that fell below the £50 excess on his insurance policy I clocked up more than £5000 the first year I had him. Obviously if the horse does not change body shape and you buy wisely to start with, the tack will be good for years to come if looked after and there are some good second hand bargins to be had, but as I keep saying to my daughter, finding the money to buy the horse is easy, finding the time and money to look after it properly is a different matter!