Hi Mike,
What about time for furniture moving and tabs / blocks ?
In a 30 ft L/D you will probably have a suite, T/V unit, Dining table and 6 chairs, possible corner units and display cabinets ?
They all need moving / replacing and tabbing ?
I couldnt do all of that, and extract the lounge / diner + HSL in 30 mins mate !
To be honest , I dont think that I could extract it all in 30 mins !
A set of stairs would take 15 mins or so ?
I am not doubting your word, but just think that you are not the " average" carpet cleaner :
( perhaps its the six fingers and other stuff that makes you so fast ? )
Cheers
Chris