Hi! I have experience from teaching executives and doctors and people from all different walks of life. My students came from Saudi Arabia, England, Germany, Hungary, USA and many more places. Generally my students appreciate my personal touch and that we dont "overdo" the grammar. Focus is how to speak, read, hear and understand Swedish quickly. I use to say that 150-200 hours with me plus at least the double amount of that time for own studies and you are at a good level of speaking Swedish. :-) Then if you want to do it in 2-3 months or 1-2 years is up to you.