From the Share Menu select Intranet or Public Site and you can edit, and add pages to both your public and internal (members only) pages. There is no fee for people to access directly via yourunit.trooptack.com, if you want your own website address yourtroop.(com, org, us, etc) then there are the regular registration fees for a web address plus a setup fee for TT to get that setup.
New Feature: Custom Domains