Once you get towards 60, for landlords, you probably should not be in an acquisition mode.  

I've been told it's 4 even if the units are rented and showing a positive cash flow, and the best idea from there is to look into a HELOC to put down payments on further properties.3) Is buying fixer-uppers with loans, private funds, or HMLs viable in the city as well assuming you can still get the properties at 70% FMV or less?

A property can be an absolutely viable deal but because of redlining and knee jerk reactions of lenders and regulators it can't be financed.

House hacking can be a viable strategy for investment, especially for those who are just starting out.

Drew the first 1 to 2 years generally agents are in experimentation mode.

We could also put expenses on a 0% credit card if we needed to.I've shared all the above with you, so you can look at your deal from many angles and also look at other exit strategies if the market changes to see if it's viable.

Buy if you see a good deal AND be leery of properties that only have one viable use. 

No I have not heard of that before or looked into that, but I would like to know more about that if that is a viable option. i sent you a request to connect. 

I have a few ideas that I have identified as viable strategies I would love to get your opinion on

As things continue to get more and more crazy over the next few months I can only see this becoming a more viable option.