Same thoughts as many above. Get it written. In IA attorneys charge $200-$250/hr. Unless you've got a lot of complications, the will will cost you an hour. ...they use boiler plate programs. Just state who gets what. And an attorney's will hold up in court. Beneficiaries may contest, at their own lawyer costs.
To avoid probate one method is to have the attorney establish a revocable living trust (RLT) mentioned above. This is another lawyer fee, but depending on the extent of your assets, the extra up front attorney fee may pay off after you die. No court costs that tend to be based on estate value. Smaller attorney fees for the long probate process. ...I've been through two probates, and the lawyers tend to drag their heels, and keep the meter running.
A decent summary of RLT vs. probate wills is below. Dig deeper before you decide.
https://www.nolo.com/legal-encyclopedia/revocable-living-trusts.html