@Rikard Lorén
Question 1: Can i buy a house and make the bank/irs look at my property as a rental property instead of "small house" ? How is it for you in the US or other states?
The bank: Anything under 4 units are considered a residential property, and can be financed using residential mortgages. The IRS doesn't care what you use the property for. The bank give you a better interest rate if you use the property or one unit of the property as a primary residence. If you are only buying it to rent out, you can take a residential mortgage for an investment property and will have higher interest rates for your loan, along with other requirements like 6 months reserve for mortgage payment, insurance, property taxes.
Q 2: How do the IRS look at houses when you buy them for investing & renting out purposes?
You report as personal income, either positive (hopefully, that is the point) or negative (hopefully not), generally your expenses (mortgage, taxes, repairs and maintenance, paperwork, etc.) are deducted from the rent you collect.
IF you buy and flip and sell, you will need to pay capital gains taxes.
Q 3: How will the bank look at the property when i come to them for a loan/what kind of loans do/can i get?
The property will have to be financable. Everything has to generally work. They will then appraise it using a third party to get fair market value, making sure you are not overpaying for the property, and that your numbers are good with good rent estimates. You will usually get preapprovals from banks before you make offers. The bank will look at your situation and decide how much they are willing to lend to you. I am not sure how this works with a foreign investor.
See Q1 for the kinds of loans.
Have fun and good luck hunting.