Possible Clues:

• Tea times rearranged? Only builders could make that up!
• Reckon roughly I'm in the middle of 6 down
• Guess this is what the builder is capable of coming up with
• Reckon, guess
• Roughly, it's in Latin I get married
• Set play from one friend - a ballpark figure
• Mechanic's figure
• Reckon I'm splitting the estate
• Guess you can expect the homemaker to arrive at this?
• Assess