Mixed use building question

[Ernesto Perez]

I am preparing to purchase a mixed used property. 1st floor is made up of 1bd unit/1 bath. The other side of the 1st floor is a small barbershop. 2nd floor is made up of a 2bd/1 bath. 

How difficult would it be to convert the first floor into a 2bd unit and nix the barbershop? Is there any difference in loan options or insurance for buying something with a commercial unit before I combine the 1st floor?