Yes - I agree with everything Hershal just said.
Deciding whether to become accredited is indeed a business decision.
However you shouldn't forget that you don't need to be certified/accredited to adopt the principles in standards such as 17025, ISO9001 etc. Doing so will usually improve, and add value to, your business - if you do it right.
If you decide not to go for accreditation, I would recommend that you at least consider developing your systems so they gradually become compliant with the requirements of 17025. This will make it quicker and easier to achieve the accreditation should you need to do so in future.
I'm reminded of a recent statement my ex-boss made to a supplier who was questioning our policy of only using ISO9001-approved suppliers. The supplier asked "Will your company accept the price increases we will have to apply due to the costs we will incur in obtaining ISO certification?"
My boss said "Yes! Provided your company also passes on all of the savings you will make as a result of improving your business".