Should I put heloc on the 3-plex due to the current low rate and use the cash to BRRR?

That helps with competition, but don't expect discounts - prices are still up 8.3% YoY.

My condos in Edmonton (the ones I bought earliest, 2 years ago) have gone up about 20-30%, but I just bought them 2 years ago to 4 months ago. 

Not brainiac stuff here, but in the end, it's the simple-but-tedious work that gets the best results. 

I just put them up on the AMHA search myself and put my PM as contact but I tend to be hands on.

In the meantime, I’d love some advice on what peoples suggestions are as to what they would recommend to study up on first.

Some of the laws in NY changed recently and you are required to obtain a certificate of no harassment, No permits will be issued until it is resolved.You will need to work with the current tenants for this certificate to be approved which can take up to a year or more, Definitely something big to consider.  

Do I send them a letter, and then follow up with a phone call?   

I bought it sight unseen as I viewed it as a small development project, did my due diligence up front and didn’t really care about the state of the house.There were 5 offers on the property to which I ended up knowing a few of the other bidders.

Also, if I were to scale up to more than 10 doors, should I have an LLC for EACH door?