uneducated idea about producing molecular machines for industrial purposes

take dna/protein/enzyme/virus or other molecular machines and modify them to produce product 

first step product is: 

more efficient molecular machine 

second step product is: 

molecular machine producing chemical 

or molecular machines organizing into a computer processor 

or molecular machines organizing into medical tools 

third step product is molecular machine producing nano machine 

goal is industrial scale production 

molecular machine self replication is necessary