And if you can, and you've really done your due diligence, pull the trigger on it!

Good to go as long as you are not being negligent.The LLC protection may or may not be worth anything and may or may not provide any greater risk reduction than is added by triggering the due on sale clause.

A “flip” (short term) by definition doesn’t qualify as an investment property so when you sell that flip it will trigger not only the tax due on the flip, but also on the deferred gain that you 1031’d into it.You can’t 1031 into a personal residence.  

I've asked about prepayment penalties, interest rates, interest only payments, closing costs, points, qualifications, etc but am unsure how to pull the trigger on one now.

I feel I took too long to pull the trigger on submitting an offer on a deal.

You might not not want to risk having an illiquid investment in the red on your books.But either way, as @Russell Brazil and a few others have pointed out, crowd mentality is fear when there is blood in the streets and normal people cannot pull the trigger in a market flooded with vacant repos.

You can also setup the following service: ability to send someone to HD to purchase items without giving them a card, you just give them your phone number; when they get to the pro desk for checkout they give your phone number to the clerk as your pro account number, and that triggers a text message asking for permission for the purchase to be put on your card; if you reply "1" the sale goes through, and otherwise it doesn't.

The building has the potential for 4-5 tenants- hair stylists, massage therapists, artists or office space.  

If so, pull the trigger on this deal.

But obviously, you'd have to pull the trigger on one or the other, first.