In the mean time, I’m focused on reducing unnecessary expenses, increasing savings rate, and continuing to build assets (both retirement plans, rental properties, etc.).  

We do include a warranty on all major systems, so the 2nd one is just as important to us, as we don't want the exposure of unnecessary repairs. 

I want to start small, learn the ropes, and avoid taking large unnecessary risks.Any advice on how to get started (meetup recommendations, reading suggestions, etc)?

 Many are probably just lazy and find it " unnecessary" to provide so much information "just to view." 

Putting 70k down is unnecessary, speaking just for my brokerage we only ask for 10k down for deals within the 250 - 350k price range.

If you discover the repair was unnecessary or that it was due to abuse/neglect by the Tenant, then you can charge the Tenant for the bill.

You clearly do not want them to stay as they are costing you money and causing you unnecessary stress.

LLCs are often unnecessary and can have an impact on your loan terms as well (i.e., a lender will often provide better terms if they are underwriting you - backed by your assets - vs. your LLC which has nothing in it).

A reserve is unnecessary, but I still keep around $15,000 - $20,000 in my account.The point is, you should sit down and assess your personal finances to determine what the worst-case scenario may look like, how much you would need to cover it without impacting your life, and whether you will need to build a reserve.

As long as your lease is between the tenant and the LLC as landlord, and you obviously don't have any additional language where you personally assume any liability, the "on behalf of" is unnecessary, you just put your title next to your name.