@Guillaume Vidallet I'll chime in here since it seems like everyone answered your question and gave some great advice.I'll suggest that whether you have one LLC or multiple LLCs you have separate bank accounts for each and make sure not to commingle any money.

Because they aren't traditional tenants in the sense with a 1 year lease and to determine fit for the house, I like to start everyone on 2-4 month leases and see how they perform.

Do not sign up for courses that cost you a lot of money.Go to talk to your bank to find out how much you are qualified to borrow and start running the numbers on what a rental in that price range would look like. 

Would you be able to put me in touch with someone that knows how to buy foreclosed bank or municipality properties?

How many banks do you work with, the commercial terms they offered you are really crappy..

Some sleep better at night with zero debt, while others love to use leverage and are willing to take on more risk.Community banks right now will go with 80% LTV.

For traditional loans that rely on personal income and DTI (Conv, govt), there is no requirement that the properties be profitable.

Some banks may lend as a HELOC on the rental property, or refinance it.

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Cash out refi will be tough due to the price, not sure if there is a local bank you can reach out for the financing.