I am planing to be with you about 10-12 days, what do you think?
Building it up takes 3 days maximum, than 7 days teaching, seting up, trials etc.
And 2 days for the weekend, makes 12 days?
I will book an open return ticket.
Than I leave from your place when it is working, and will return in 2-4 months of time (during China ceramics?) to see how you are doing.