As stated before the 1% rule is just a rule of thumb. In my market I need a 2% -3% rule for it to make sense due to higher property taxes and heating cost. If you like the property you need to run the numbers and see if it makes sense.
At a high level, if $1200 -$1500 is the market rent then I think the price is just to high.
At $720k if you put 5% down you’re looking at at least $4500 probably closer to $5000 a month for mortgage, taxes and insurance. If you rent 3 apartments for $1500 each and have no vacancies, no repairs, and every tenant pad on time forever (which is I mpossible).. then that’s $4500 a month in rent. So to live One unit you’d have to pay about $500 a month to cover the gap. But then you’ll have to come out if pocket to pay water, sewer, house electric, and do the landscaping and maintenance yourself.
So basically the best case scenario is you give the bank $40,000 (5% down payment) so you can pay $1500 month to live in an apartment (which is market rent) while exposing yourself to a lot of liability, work, and potential to lose some money. And that’s pie in the sky absolute best case scenario.
Love the idea and househackimg is an awesome way to get started or to grow a portfolio. Just be patient and make sure to find the right property.