I need a estimation?

my friend is looking for a property so she can buy her new horse (shes not a first time owner so no advice please). she is looking at all different houses and not only ones fullly equiped with horse facilities. so she would like to know how much and how inconveniant it would be to get these things built;
dressage arenas. practice size
1 stable high qualtiy for a 15hh horse
and a wash bay
if anyone in AUSTRALIA knows the basic starting price of any or all of these then i would love to know.
ps i told my friend to post this but she was too confused. shes not very good with the internet.
also i would like to know your input on weather or not it would be better to get a house with these facilities or get a house with clear land and get them built when she moves in.
thanks
Wonder
Answers:
Well, I see two sides to this. 1. Building your own puts the things you want where you want it however, you have to hire people to prepare the building area, leveling ground, putting in roads, bringing in fill, sand and gravel, etc. Then to build the barn, cost of hiring people to do fencing or preparin yourself for the task and it takes a lot of work to build a quality horse fence, and then all the materials for the box stalls. You have to figure a pretty big cost and additional time to get the place up and ready for horses.
Purchasing an already complete facility, you may wish your barn was over there instead of where it is or find some little things to add to or clean up/fix but you can move right and bring your horse with you while you update the place and make your changes to it.

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I would probably contact a realtor in that area and ask them those questions. Or see if theres any realtor websites in the area and do some searches.