Many more facts are necessary to answer the question. You should hire an attorney who is board certified in estate planning and probate law to discuss your estate planning options. If an enity is going to be used in estate planning, it is generally better to use a family limited partnership or a limited liability company than a corporation especially if corporation is a c corporation for income tax purposes. You may want to discuss with the attorney you hire using a revocable trust that at your death creates a lifetime trust for each child, which can protect a child's inheritance from creditors and a spouse if child would be divorced.
I concur with Mr. Clausen. Your question goes beyond the standard "what type of entity will best preserve my assets," once you add Trusts into the equation.
I concur. While using the Corp may be useful it doesn't tie your Estate all together in a nice neat package. The Stock of the corporation would then go through Probate at your death if a Trust is not in place as its owner. You are well advised to seek competent counsel. See .com under 'Find-A-Lawyer'. Good Luck to you.
I recommend discussing your situation with an estate planning lawyer who also does business entity formations and asset protection. There's just not enough information in your question to give you a good answer.
Trusts typically don't provide any asset protection, other than some trusts can protect the trust corpus from a "beneficiary's" creditors. But not a self-settled trustor's creditors (the person who gives the property to the trust).
I typically advise against running multiple businesses under a single entity. If the businesses are producing enough profits to offset needing to pay for an extra tax return each year, I find it a no-brainer to keep things separate. Texas also has a newer kind of LLC called a series LLC that may apply to your situation, particularly with real estate.
Also, taxes need to be considered. Many times S-Corp taxation (probably what your corporation is taxed under) is not good for owning title to real estate unless you're in the active home flipping / building business.
A good estate plan should intertwine with your business and asset protection planning. More than just a trust is needed to take care of your estate for your 3 adult children.
I hope Cedar Creek is finally full; I haven't made it out to my parent's place in Trinidad in awhile.