Talk to a lawyer. There are flaws in a lot of the free documents, which could cause an expensive problem after you are gone. They also aren't sufficiently detailed, and often aren't state specific. For example, what happens in your state if you get divorced and die before you redraw your will (fairly common)? You have to be careful drafting if you start getting the slightest bit complicated. For example, my parents want to give a share of the money they have to a charity (and shares to the kids), but the house to be split only between the kids. The language the charity gave them to put in their will was flawed and would have opened the door for the charity to have rights over the house. (This was a mistake on their part, not an intentional "oops.")
Best way to be frugal is to have a clear idea of all of your assets and what you want to happen to everything, so you don't take up a lot of the lawyers time when you consult with them (if paying per hour and not a flat rate). For example, if you have 3 kids, and one dies leaving 2 kids, do you want the grandkids to "step into the shoes" of the kid and take that share? Get nothing because their parent predeceased you? Or split it 4 ways (2 kids, 2 grandkids), even if the 2 remaining kids themselves have children? What happens if your spouse is in the same accident as you and dies after 24 hrs/96 hrs/30 days? (Some states have specific rules for this.)
Arebelspy is correct, a trust may be something you'd want to consider.
Regarding notarzing and witnessing - requirements vary by state. Some states require 2 witnesses, some 3. Some require that a witness can't be someone receiving something in the will, etc.
And on today's fun fact from my trusts & estates class by Professor Mann, now husband of my Senator, Elizabeth Warren: Long ago, they used to use kids for the witnessing (the point of a witness is to have them around later to testify about the signing so you want someone young) and they would actually hit them on the head while they were watching the signing to help them remember the moment. Because of course you remember when you got hit on the head for no reason, when you didn't do anything.
**I am not your lawyer, I am not licensed in your state, and I am not providing legal advice above**
