Some Customers and Builders

[Spud]

sounds like you have had a lucky escape

 

[jlktiling]

Proof that you should keep a diary of jobs that you go to, particularly failures, and then present them to the customer when quoting, and then you can show them what it would look like if it when wrong!
Get an ipad or tablet, then put the photos on there for the customer to see.

 

[bugs183]

Pants isn't it...
The troubler is with that situation Joe Public have usually spent all their money before we turn up to measure, they're fed up and just want it done, cheaply and quickly.
They've had tons of extras off the builders and plumbers and now when you do the right thing and suggest that the walls need sorting they just don't want to hear it.
That guy did you a favour by getting the job, but that isn't the point, huge Porcelain tiles are awkward enough on a decent wall what with size and weight, let alone a lath and plaster wall.
You suggest the correct way but don't get the job cus it doesn't suit.
Ah well, you won't be the one fighting with lath and plaster once it starts falling apart!!!!