@Will Dennis
I think there's a couple of things to note about the advantages of house hacking your 1st investment...
1. Qualifying. You need to be able to qualify for the loan. If you go the FHA route (which many house hackers do), I believe FHA will count 75% of potential rents towards your purchasing power so in theory it could be easier to qualify for the loan because you can afford more on paper. If you don't use an FHA loan, some lenders will only count that 75% of potential rents if you have 2 years of land lording experience.
2. Low Downpayment. Like I said above, many investors start house hacking because they can utilize FHA loans. FHA loans allow for a smaller down payment, usually as low as 3.5%. If buying a MFH as strictly an investment, many lenders have different overlays and therefore will require a lot more down. I talked to a lender a couple of months ago and they required a minimum of 25% down on MFH investment properties.
3. Rate. FHA and owner occupant loan rates tend to be better than rates on strictly investment properties. Also if you're a First Time Home Buyer, you might be eligible for special grants.
4. Management. You're living on site and therefore will hopefully be able to manage more effectively. You'll see things day to day and might be able to correct things before they become huge issues.
5. Tax Incentives. There's more tax incentives given for owning properties then renting so you could potentially be missing out on tax breaks.