Maybe I'm jumping in at the end when most of the obvious has been stated but I have another couple of things to add...
First of all congratulations on having the idea and what seems to be the passion and drive to see it through. It seems most people here have been supportive, but in a realistic way, they want you to succeed but also don't want to see you getting in way over your head with something that quite simply may be too large a project to do on your own. It's not saying you can't do it or won't do it but take what people have said here and use it constructively. Things like contacting an existing club, look at using existing infrastructure to lessen costs and probably the single best bit of advice is to look at getting an experienced project manager. Someone who is well acquainted with juggling the legalities and complexities of managing a construction project from the ground up because at this stage that is exactly what it is. You may be able to do it on your own but a project manager will make the process a lot quicker and easier.
A couple of ideas for you to possibly ponder:
1. If you don't want to look at existing infrastructure and will go ahead with the private land, look at first building trails that are quick (relative) to finish, that you could use to get some cash coming in to help with the ongoing cost of construction. The quicker you can have punters paying for access the quicker other things will happen. I would look at maybe a BMX track, dirt jumps, 4x, foam pit/airbag etc. Not to down play how much work or money goes into building these but I would imagine they could be built a lot quicker than km's of MTB track. If it was close to a train station imagine how many young people would possibly come to make use of these legal facilities?
2. Really look at existing parks, even non MTB ones as its a similar concept, they might just be a gold mine of information even if its "not what to do" stuff. For example the Penrith White Water Stadium. Similar idea to a MTB park, huge running costs in regards to pumps but could give useable information on things like marketing to beginners, enticing families, promote repeat business. Of course look at MTX parks other MTB parks and if they are not in direct competition with you they may even be forthcoming with costs and other info.
3. Look at the idea of having world class training facilities - people love going somewhere warm to train when its snowing at home and having everything available for a training camp could be the enticement they need to come and stay for a while. Again using the Penrith White Water Stadium as an example as its what I know about, they used to get national slalom teams coming here in the summer to train. Not sure of the numbers are still coming but that would have been a huge injection of cash as they would hire the stadium for exclusive use for training. Maybe look into what facilities Australian Cyclists use?
Finally make sure you know what is involved at every step of the way - I started to design a kayak a couple of years ago. I had the bright idea, the plans and the passion for it. I jumped in at the deep end thinking I knew what I needed to do and at every stage more things popped up, hidden costs, skills I didn't have and in the end I gave up because I wasn't prepared enough and it got too big. I'm telling this little story as I don't want the same thing to happen to you because this project is a lot bigger and way more costly than my kayaking making escapade.
Good Luck
Don
Thanks Don your the kind of people we are looking for people and for the person calling me 14 year's old ,I couldn't care less really about you ?
If a 14 year old came up with this idea wouldn't they be a smart kid !
This is a forum not a uni assignment !
Paddock with jump's on it ??? go for it guy's go do it !
If you read my first post you would see I have put alot of effort into making this a viable business idea for many people!
The comment about me spending ten's of thousand's of dollars' on action sports equipment and camera's/editing software was a statement about how passionate I am about action sport's and film production and nothing more !
As for seeing first hand how resort's get the PUNTER'S in I have worked at the following resort's Thredbo,Treble Cone,Cardrona and travelled to Japan.
And I have been to and filmed San Remo ,Black Hill,Coff's Harbour,Eagle Park,Ourimbah,Mt Stromo,Glen Rock,Awaba,Kincumber,Argenton,Tenanbit.
And of course built trail's and DH tracks like all keen mountainbiker's.
Our course this does not make me an expert on park building !
But I know what rider's want and need through talking to so many and of course riding myself.
If this park goes ahead we will have the most professional people we can find for the various position's.
When it all come's down to it, if this park is built it would be for the next generation of kid's coming through.
A awesome place to train ,get coached,film,compete or just have a great time riding which is what I live for .
I'm sure I will be getting some derogatory comment's about this post aswell.
But Im not replying to anyone who's not all for helping this project move forward and give me great information.