Probate can take up to 1 year and sometimes longer.
Creditor problems and the sale of real estate can make the process longer.
Once the attorney and PR are-selected-see if you can work out a beneficiary agreement.
The answer given does not imply that an attorney-client relationship has been established and your best course of action is to have legal representation in this matter.
An initial question is whether the listed PRs want to serve. If not, a waiver may be useful in order for your brother to be appointed.
There are many factors that can speed up or slow down a case. You should contact an attorney to discuss. Many attorneys that practice here in Brevard and Indian River County provide free consultations - reach out and meet with one -
I would agree that a probate estate would take 9 months to a year to probate. I would also consult with an experienced probate attorney to discuss your options. It may be possible to wait for 2 years before commencing probate. If you wait, and not creditors begins an action against the estate or petitions to open the estate, it may be possible to avoid unsecured creditors by waiting for 2 years. An attorney can explain to you how this works.