Not sure about your facts about homestead passing outside of probate.
Was the home listed in the probate petition and order requesting to determine it as homestead or was it a life estate with remainderman named?
If your brother was named as PR and the heirs wanted him to sell the homstead-I think he would be entitled to reimbursement of expenses to the extent of assets in the estate(not from beneficiaries directly) and approved by a probate judge.
Fees are not paid from his PR salary.
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.
a PR is generally entitled to reimbursement for reasonable expenses. My suggestion is that you retain independent counsel in FL in the county where probate is occurring to review the documents to determine whether it is worth your while, keeping in mind that generally all of his expenses in legal fees are paid by the Estate while you have to pay yours with no guarantee of reimbursement or contribution from relatives.
I strongly recommend that you meet with a probate attorney, at least for a consultation, to review and discuss the matter. Depending on how you received the accounting or proposed distribution plan, you may be on a deadline to object or forever be barred from doing so. It may be very wise to have an attorney represent you in this matter rather than trying to do it pro se.