@Chris Pierog thank you! I currently work a full time job in sales and I acquired my previous deals through just saving as much as possible. Also, then using the cash flow from that deal to snowball into down payments for my next purchases. You can really accelerate your savings when you apply that cash flow recycling mentality.
I started off house-hacking by accident, before I ever knew what it was. I bought the house I live in currently when I was 24, and my friend and brother ended up moving in with me, and eventually my now wife who was my girlfriend at the time. This was the catalyst for my interest into rental properties because I saw how quickly I could save money when my biggest expense (my mortgage) was covered and then some! I HIGHLY recommend house hacking either like this or buying a duplex. It's kind of like training wheels for being a landlord.
The best deals are probably off market through wholesalers, but I have only used the MLS up to this point so I can't knock that method either.
I purchased my house hack with FHA financing (3.5% down), and by luck I bought in 2012 which was a great time to buy, although I didn't know it at the time. Now my house has appreciated enough to have over 20% equity in it, so I refinanced into a conventional loan to drop the PMI and lower my payment down.