BFR is sooner than you think
Assuming BFR will be many years off is very ridky.
BFS ship #1 is being assembled now in a temporary facility, and the full up San Pedro CA factory at Terminal Island should be ready in late 2019. Janicki Industries (B2, F-22, 787, B-21 Raider etc) does the large composite structure fabs (propellant tanks etc) near Seattle and ships them to SpaceX. One oversize (12 meters) LOX tank was tested to destruction, and passed.
The Raptor methane engines have been on the test stand for almost 18 months, with partial funding from the USAF. Reports are good, with videos of stable burns dating to Sept. 2016.