Omar,
This Pressure Pro unit would be perfect for your applications. The unit has plenty of PSI to tackle the jobs at hand. Also, the unit uses a Honda engine paired with a CAT pump which is the best combination available in the industry today.
In order to tackle 2 story applications, I would recommend purchasing a telescoping wand. I would recommend the General Pump 24FT wand model DCLTG24. This will be the best way to tackle 2 story applications. For your convenience, I have attached a link for you to view that item.
General Pump Telescoping Wand
As far as stripping paint, I would recommend purchasing a turbo nozzle for that application. I would recommend a 3.0 orifice turbo nozzle model 80155. I have attached a link for you to view that item as well.
3.0 Orifice Turbo Nozzle