There was no trust fund.
Here is a link to his grandfather's will. With three children, the estate appears to have essentially been split into thirds.
I am going to point out again that there is no evidence for any kind of currently extant "trust fund" which Rekieta is a beneficiary of, certainly not any created by his grandfather. It's always seemed more likely that Nick has received ad hoc transfers from his parents.
On page 4, Section VI GIFT OF TAX EXEMPT AMOUNT, it says that he gives the maximum tax exempt amount to the Trustee of the Family Trust. It says right there that there was, at least at the time of the will, a Family Trust.
Just prior to that, also on page 4, under Section V GIFT OF RESIDUARY ESTATE IF DEATH IN 2010 AND NO ESTATE TAX, it says that there is The John Owen 2010 Trust, The Celeste Rekieta 2010 Trust and The Paul Owen 2010 Trust. Each of which was created on the same date as the will.
There's also Section VII GIFT OF GENERATION-SKIPPING AMOUNT, where it says that if his spouse does not survive him, then he gives the generation skipping amount ... in equal shares to (1) the Trustee of The John Owen Trust, (2) the Trustee of The Celeste Rekieta Trust and (3) the Trustee of The Paul Owen Trust. Each of said trusts was created on November 3, 2005, by me and my spouse ... and the child of mine whose name designates the trust, as Trustee.
Section VIII is the Special Marital Trust. It says that there is a trust fund, separate and distinct from the Family Trust and the three Trust Funds for the separate children. It says that upon the death of his spouse, the remaining trust estate shall be distributed in equal shares to The John Owen Trust, The Celeste Rekieta Trust and The Paul Owen Trust.
Section IX is literally titled FAMILY TRUST.
It literally says that "The Trustuee shall pay so much or all of the annual net income of the trust estate to or for the benefit of my spouse and any one or more of my descendants in such amounts and proportions as the Trustee in its sole and absolute discretion shall deem necessary and appropriate (without regard to equality of distribution) for the health, education, support and maintenance of such beneficiaries according to their accustomed standards of living, considering all other sources of income available to such beneficiaries. My spouse shall be regarded as the primary beneficiary of these distributions during my spouse's lifetime."
You tell me that the will is evidence of no trust fund, but by the fifth page of the will, it has explicitly said that there are individual trusts for each of the children, lists the date on which they were created, and also says there is a Family Trust, which suggests that it is a trust separate and distinct from the children's trusts. By page 8 we've gotten to the wife's trust fund, and gotten the details of how the Family Trust fund can be used exactly the way people here have speculated to maintain Nick as a permanent child. I'm going to keep reading - but can you tell me what it is you read, citing pages at the least, that led you to say that there is no trust? Because the first 8 pages are section after section saying literally the opposite.
((edited to fix a typo))