2in

The home owner strikes again... I told my wife id make her a second bathroom before first developing the requisite skills. Its gone alright so far but i am absolutely losing my mind over trying to install this alcove shower/bath. I bought this tub kit...

Tl.DR I am replacing everything on my 2in well. The jet at the bottom has a check valve already installed. Should I still add a foot valve under the check valve? Is it better to use the pressure switch on the pump or the pressure tank? Or maybe both? Is there an advantage to buying a 2HP pump...