Buying an investment property at 21 shows amazing foresight and financial responsibility.

Buy on market, nothing wrong with that.

Michael,   A good book to purchase is "Professional Real Estate Development: The ULI guide to Business.   

I know that when I’m buying a loan, I’m buying the future payments at some price.

Investment Info:Small multi-family (2-4 units) buy & hold investment in Duck Creek Village.

They are sure cheap to buy and build up.I thought of building a place out of a part of a 747.

That does not require employment or job seasoning instead it uses the rents to qualify and you can take out up to 80% LTV cash.Use the cash to put down on the next 1-2 or more properties as long as the other properties are debt servicing themselves it opens up more opportuities to buy more future assets and increase your passice income.  

You won't be 6 months of hard work from buying, you'll be 6 YEARS. from buying a property. 

I already have a hand shake deal on the next property, another duplex, that I will buy come summer time.  

There are two types of return from a rental propertyCash Flow & Appreciation.I normally also aim for a minimum of 8% return between Cash-Flow and Appreciation.Appreication, nationally, is around 2% to 3% annually.Therefore, your goal is to get the cash-flow to be about 5% to 6%.The issue is interest rates being very high, you would therefore, need to buy at a pricepoint where the numbers still make sense.You can always put down more of a downpayment to cash flow, but that will impact your cash on cash return calculations.Best of luck!