Powershell Script to Gather PC hardware details from existing Computers

Hi All, 

I was hoping if someone has done this scenario before. I'm looking for a PowerShell script to gather PC Hardware details in the local network. it's Windows 7,10 and not in DC. 

Details I would like to get from each PC is 

1. RAM (name and size)

2. CPU (name and size)

3. HDD (name and size)

4. Local User profiles

Is it something possible (logically I can't see how it's possible) as PC's are not in a domain. 

Any suggestions would helpful 

Love & Peace 

My fellow humans.