visual studio 2017 vs sql management studio
Although Management Studio is based-upon Visual Studio, the two are different products and have different target audiences. You will not be able to use Visual Studio to do all of the tasks that you used to use Management Studio for. Even installing the data tools and creating a SQL Server project within Visual Studio will not give you the functionality available in Management Studio.

Visual Studio is primarily used to make development easier whereas Management Studio is orientated towards making the management of SQL Server easier (with some development components.)

Like I tell a lot of the guys that work with me, choose the right tool for the job. I have both installed, though I do agree that they use a hefty amount of space when installed together.