Recruiting in reality is a numbers game. You can expect to sign about 25-40% of the players that you offer that take a visit. Logically then you need to get visits from about 3 top twenty players annually if you target to sign one difference maker annually.
If over a 5 year period you can get 15 difference maker visits and sign 3-6 of those that visit you school then you will have about 3-4 difference makers on every roster, assuming you lose one occasionally for a variety of reasons. A roster with 4 difference makers can contend for national honors annually.
Otherwise with varying talent from year to year conference championship contention and a visit to the S16 is a more realistic expectation. Additionally you might exceed the S16 but that will be the exception not the rule.
Look at recruiting history for Stanford, Notre Dame, Duke and Tennessee and their numbers of top twenty visits will be 3-6 annually and be at the 15 level over four years.