If you are using the services of a “professional”, then I am surprised that you need to seek out builders yourself?
You mention “I have had two companies out to give quotes but the written quotes are useless”. Isn’t that within the brief that the professional you employ operates?
You also mention “Most builders obtain the licences anyway from what I hear”. Why are you employing a professional and listening to hearsay?
It is mentioned “My problem at the moment is that I have 3 “quotes”. Recommended by local Spanish people including the agent I bought from.
These “quotes” are totally vague, open ended, no payment schedules or whatever and just saying it will be done to plan.
Well I am sorry but they weren’t good enough for us. Not “Professional” enough”
Your employed professional should be attending to these matters.
There is something here that doesn’t make sense.