CLIENT VIEW

I would like a feature where I can adjust quotes/invoices at the clients home in which I would l need a full on “client view”. I’m deathly afraid to open up a quote or an invoice to check on the pricing of something because I know my markup is right there. I need to be able to make these adjustments on at the clients house without revealing my cost numbers. Basically a full on client view of the entire website would be good! thank you!