A well built wheel should stay that way over thousands and thousands of km and need little to no attention... just checked a front wheel I had used for commuting, utility, and off road riding that has well over 5000 km on it and it was still 5 by 5.
Was a Formula hub laced to an Alex 2100 rim with DT spokes... came to me barely used and I tuned it up 4 years ago before running it just to make sure it was 100%.
This wheel sells for about $80.00 (off the peg) and is a really good deal, the rear runs 100.00... pretty nice for factory built methinks.