Would it be more effective to buy a property off of the property tax auction instead of purchasing a property off the general market when applying the BRRRR Method ?

How will it effect the others credit scores if the HELOC isn’t payed on time?

If they've previously been a strong tenant, working with them to help them on their way or until they are back on their feet may be more effective than eviction. 

So you just buy your first BIG DEAL you have a 10 unit, 35-bed student housing complex and you bind GL on the property but didn't disclose that more than 10% of the occupants are Students, effective that moment you have NO insurance. 

When I initially looked into it, it seemed like it would not be cost effective for C class buildings without fancy key card access points, but maybe something has changed. 

Does the house have a suite or could you rent a room to decrease your living costs (the latter depends on if you'd want a roommate and not everyone does).

I may just be a normal guy but what I hear is the most effective way to scale is daily, consistent action.

There are similar houses with connected mother-in-law suites and what not, but not exactly the same situation.

You could still lose the property in an hypothetical law suite, etc. 

But under FEMA 2.0 the surcharge incurred for a claim within the last 20 years only applies to claims filed after FEMA 2.0 goes into effect.