OK so here is a question about what may be a NZ vs UK interpretation issue or may just be a local thing round here - not sure.

1) In my view, a quote is a specific statement as to how much someone will charge to do the job and isn't variable

2) An estimate is what it says it is and might vary

and related

If you approach a specialist company to do something you have no knowledge of and ask them to make a recommendation and quote for that, then you ask them to do what they specify and then their recommendation turns out to be inadequate, requiring further cost to be incurred to arrive at the desired outcome, that extra work ought to be at their cost not the clients since they made the error in specifying the job.

Thoughts?