So you will not be owner occupying a primary residence.

So long as you can keep it occupied and drive up your base rent over time, your property will appreciate and you will maintain (and increase) your equity. 

I know federally backed loans are required to give 30 days notice but I believe that because it is a triplex and the other two units aren't owner occupied it allows me to do a 3 day notice. 

DSCR/hard money are non owner occupy loans.If you decide to do FHA203K for the first home - a 203K consultant/inspector will be required for the standard 203k loan, you will unlikely be able to serve as GC and you sign a 1 year occupany affidavit.

An owner-occupant would be concerned on comps for other owner-occupied, but best and highest for this property may be as an investment, hence income.

Theres someone living in the side that I will be occupying until the 1st of February, but since I JUST became the owner, would it make sense to reach out and ask them something like "Hey its __ the new owner, just checking in to see how you're doing.

Too bad you can't buy something owner-occupied, put 5% down with the best interest rate, live in it for 12 months (and fix it up), rent it out and repeat the cycle.Here's some other info you might find useful:----------------------------------------------------------------------------------------------------------------Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

Hard money is a type of business loan for non-owner occupying investors.

If my spouse wasn’t opposed to moving I would try to buy a new house hack every 12-15 months and use low down payment owner occupied loans for as long as it made sense.

There are some amazing physician loans available that can allow you to purchase a owner occupied single family property with 0% down.