Use of marketplace content with single user on several machines

Hello,

My friends and I want to try and create a game (without any previous knowledge) with the use of some blueprints and other content, I wanted to know if it is legal to open one account that would be shared and used at the same time or do I need to purchase all the content separately on each individual account?

Generally, you are not permitted to share Marketplace assets. As an exception to this, however:

You also may Distribute Content to an
Engine Licensee who is your employee
or your contractor regardless of
whether they have rights under their
license to the same Content, but only
to permit that Engine Licensee to
utilize that Content in good faith to
develop a Product on your behalf for
Distribution by you under the License,
and not for the purpose of Content
pooling or any other Distribution or
sublicensing of Content that is not
permitted under this Agreement.
Recipients of such a Distribution have
a limited license to use, reproduce,
display, perform, and modify that
Content to develop your Product as
outlined above, and for no other
purpose.

So the people that work for you on a project can share assets for that project.