Buying SFR homes to live in and to rent (Snowball Effect)

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I am a 22 year old real estate investor. I just sold my first home today and should be going into escrow soon. It was a huge 2,000sqft 4bd 3bath on an acre in a very rural area. Previously used as a residence then a rental. It was a great personal residence but I learned it was a lot of maintenance for such a large plot of land/size of home to maintain as a rental for others when one could essentially just have a quadplex. My next journey I will be purchasing a smaller home for myself 2bd 1bath with minimal maintenence, small yard, ect. Then eventually turn it into a rental property when I move out. My plans were to buy it right with an all cash offer to save a monthly mortgage expense and have instant equity, then a year from now I would move out and obtain a loan or heloc for a second home that I would then live in and eventually rent as well. The first home would be a necessity for I currently have no where to go after selling my home. Any advice on this would be very helpful. How much should a rental should cost to monthly cash flow ratio. Im located in NV and I see some property in this town rent for $750 monthly and selling for $80k-$120k and not much to choose from here (Very few listings). Not hesitant to invest in other states at all I just don't know the numbers as well as locals in other states and communities. I know there a lot better market places out there but wouldn't know were to start. I really appreciate the support from bigger pockets, I have been learning a tremendous amount of knowledge and applying it in my current situations and couldn't be happier. Thanks BP!