For maintenance I certainly prefer to get at least 2 sometimes 3 opinions/quotes.
Just last week was very busy with a school event away from home and got a call from a tenant that hot water wasn't working, a plumber had come around said system was old required replacing, as it was electric and required an outside concrete base was going to cost $2,500.
As I was very busy with the school event was debating whether to get a second opinion especially since the tenant had no hot water.
I felt the quote sounded high so decided to get a second opinion, due to limited tenant availability and a tradie not turning up it took 2 and a half days to get the second opinion by which time I was feeling a bit bad due to tenant not having hot water.
The second opinion determined the main hot water tap which was located in a cupboard in the bathroom had been turned off
most likely by one of the kids, the 2nd plumber charged what seemed an excessive call out fee of $165 but I was happy to pay it considering had just saved me $2,500.
Contacted the original plumber to find out why he didn't find the cause of which as I expected I never got a response