Request information / Building a 3D Theme park

I hope this is the right section

To make a long story short:

I am the owner of a well running community.
Now I would like to offer my members a 3D theme park, however, I do not know if my idea can be achieved.
And if it is possible, how expensive would it be?

What do I want?
I would like to have the exact copy of a Theme park that excisted in the past, but that is closed now.
I would like to see it work like Second life, but the members cannot have the option to build anything.
The idea is that their 3D avatar can enjoy the attractions (for example: 3D rides and rollercoasters...) but they need to pay an admission fee.

Is this even possible?
What time would it take to build something like this?
And even more important: the budget?

 

Looks like I'm asking a little bit too much?

 

A 3d world with high end graphics like second life is going to run you hundreds of thousands, if not millions of dollars.

 

Very true. You would need to hire many people to get it done, and would take at MINIMUM a year.

 

You need to find a firm, not freelancers like here on Digital Point.