Before change contractor or service company
In these difficult economic times, are continuously revised costs for the smallest possible expense, and ask for alternative budgets. Having had many experiences in this regard, we can say that those savings are not always easy after match expectations, and leads to problems not previously calculated.
When a service company has extensive experience in a community, knows the peculiarities of the building, common faults, previous repairs, good relationship with suppliers, etc. That is why all that knowledge (the famous "know-how" in the industrial sector) should be viewed and ponder before changing service providers.
When someone brings us a budget with negligible economic improvement, nor look as an alternative because experience shows that after the adaptation time required to acquire the "know-how" can not offset the expected economic benefit. It is also usual to have a budget miscalculated and that an impact on the end service, negating the expected benefits of the new carrier. And the good relationship with the company that has spent years serving can get us out of more than a rush or urgency.
It is for this reason that when someone brings us an alternative budget, we always recommend to consider the advantages and disadvantages of changing service provider, because if we are satisfied with the current provider but only want to reduce costs we are probably not be worth the change. There is also the possibility of dialogue with current service provider and seek ways to reduce expenses.
Our recommendation, therefore, is to change contractor only when the economic difference is important and also have good references from that company or professional.