$800k at a couple extra percent means it’s costing you AT LEAST $16k PER YEAR in additional interest.

Is it advantageous, or is it difficult and anti-foreigner with extra stamp duty and such?

It may sound nice to pay a 6% management fee but the extra fees can add up to be more than the other company that charges 10% with no additional fees.

House hacking lets you live in one unit and rent out the others, which can help cover your mortgage and generate some extra income.

No extra fees added for repairs, I'm allowed to contract my own people via the PM to do services(HVAC, lawn, water heater, etc.)

Also, if anything were to go wrong I wouldnt have the capital available to pay extra on a property every month. 

My opinion-- buy in the winter, underwrite with an extra long vacancy, get some seller concessions to defeat the cash flow if it's really that tight.

You’ll need to find a GC on board with the extra paperwork and a seller willing to accept a longer closing time.   

Now your fully renovated home is getting top dollar rents, you could probably refinance too since rates are poised to go lower (lowering your monthly obligation), you could open a HELOC before you move with the extra equity and use that to fund your next deal and now you have 2 homes! 

@John Cooper when you or someone you care about is living in the home it is important to be extra vigilant in choosing tenants.