Yes, you can but I urge you to see a Tax Attorney and an Elder Law Attorney before you do so.
If you give your house to your son, you also give him your basis cost for the property. Since you have had the property for 50 years, I imagine that you paid under $25,000 for the home. If, in the future your son sold the home for $375,000, your son would owe Capital Gains Tax on the difference between your basis cost and the selling price. In other words he would owe 15% of the gain of $350,000 or $52,500. With inheritance comes a "stepped up basis" which means that the heirs' basis cost becomes the value of the asset on the date of death of the benefactor. If you son inherits the $375,000 house and sells it for $375,000 then he owes no Capital Gain Tax because there is no gain.
If your purpose is to save on Probate costs (which in California are set by law) you should consider a Revocable Trust or Living Trust. Given the value of your house at $400K and with other assets of $100K for a total Estate Value of $500,000, your Probate would cost would be $13,000. A Trust would cost no more than $5,000 and that would be for a very complicated estate. Having a Trust avoids Probate entirely and ensures a quick and orderly transfer of the estate to the heir.
If your purpose is to avoid paying for medical care for yourself and have Medicare and MediCal pay for your care by transferring your assets so that you are indigent and cannot pay yourself, then be aware that there is a 60 month (5 year) look back period by Medicare and MediCal. What that means is that if you do transfer assets then you are not eligible to receive MediCal or Medicare assistance for 5 years after the transfer date.
Basically it is almost always better to inherit than to receive an asset as a gift. It is also almost always better to use a Trust to transfer your assets to your heirs than to go through the delays and costs of Probate. If you get a Trust made for you by an Attorney, it will save your spouse, your estate, and your heirs possibly tens of thousands in unnecessary taxes and fees. It will cost you a few thousand, but in the long run, it is much less expensive.
An entertainment attorney is an attorney who specializes in entertainment law. Usually they work in either contracts or litigation.
I'm guessing the person told you that you need an entertainment attorney to write up contracts for the people you will employ to work on your demo/pilot thing. If you're in a big city, like LA, a good entertainment attorney will cost you a minimum of $200 an hour, the best go for much more.
Here are some books you should take a look at:
Contracts for the Film & Television Industry by Mark Litwak
The Pocket Lawyer for Filmmakers: A Legal Toolkit for Independent Producers by Thomas A. Crowell
Dealmaking in the Film and Television Industry From Negotiations Through Final Contracts: 2nd Edition Expanded and Updated by Mark Litwak