Is it necessary or is social media sufficient? 

The big influencers on social are still talking about forbearance and foclosures - if I do some napkin math and divide it by 50 States, that additional inventory (most will sell, not forclose) will not amount to enough to fill the market.How will we get out of the inventory shortage?

Bring some sort of value to them when you interview with them -- is it social media knowledge?

HELOCs will give you powerful "check-writing ability" that works well for flipping homes, doing BRRRR style investing, and similar, but can lack the stability of a refinance.In light of the current chraos (crazy chaos . . . the only sufficient description of our social, political, and economic policy interplay right now) I'm personally looking to secure as much good debt as possible, amortized for the longest period, for the lowest interest rate. 

What techniques could I offer to solve this problem?

From my perspective (news, social media, tax laws) it's a mess.

I've tried the most obvious route and went through social media with no luck. 

My question is how far off the first are they, I have heard of some tenants on social security or pensions that don't get paid until the 3rd or 4th and most landlords are happy to work with them as they have guaranteed income. 

Now they rent out the two/three (kinda forgot) residential units above and behind it.Like I said, "house hacking" seems to have a few different meanings/techniques, so there are different ways to apply it. 

I recommend jumping into different social groups, attending conferences, check out YouTube for videos, and connecting with others in the space.