You could build one row of Block Breakers that goes up to say Level 80 and makes Space for the Sun.
Lets assume I want to have at least a width of 10 BB (which is pretty low), so I'd need about 10x80 = 800 Blockbreakers for that setup, which would be about 3200 iron just to build them. So unless you have already more than enough resources, there is no way to build a TBM this huge at the beginning of the game.