Can a computer genius repair my Macbook Pro? (Roanoke)

My 2018 MacBook Pro got a virus and I accidentally totally erased the entire computer.
The load computer repair store said to send it into Apple to be repaired.
I think it needs a new OS and everything installed.
Can you do it at my house? It is a good computer I got new in Jan of 2019 and edits my videos really well.
I also have a 2019 MacBook Pro with only 500tb hard drive and low memory that I got for only $1000 rather than have to mail in to Apple my really good 1tb or 2tb hard drive 2018 Mac.
I would like to also install a new bigger hard drive on my 2019 Mac and better memory, can pay you $1200 to do the work at my house one day plus cost of hard drive and memory if you can do all this work to both of my computers.