Do others use more than one type of attorney?

Is it common to have a general attorney who wrote my parents will, an elder law attorney who I have hired following my Mom's passing and now hire an estate attorney to help with all of the legalities of financial institutes and properties? OR would the elder law attorney be acceptable to help with the financial side too?
I thought I would throw this out before I asked the elder law attorney.
Info about Me-I was POA for both parents for 2 years. Now POA for my step dad (who has 2 diagnosis from different doctors of dementia) and executor for my mom following her passing. I will be my step-dad's executor as well. All assets go to my step-dad who is no longer capable of understanding any of this.
All of my mom's assets will now be in her husbands name. Since he has Dementia, can other inheritors legally be named as beneficiaries as someone had mentioned in my last post? So much to try to understand!
Thank you All for your advice