Hi folks, I have some comments/questions regarding how to best prepare when applying to a heloc.  

The LOI provides clear written and agreed terms to help prepare the contract.Sales Price, Due Diligence period, financing terms, Who is paying what fees, what you are requesting for due diligence (leases, financials, maintenance schedules, etc.), Hard or Refundable Earnest money & terms for that, broker representation, title company, attorney info, etc.Best wishes to you. 

To increase our potential deal flow for fix & flips, we're preparing to start direct to sell mailing campaign.

Some of their products have a toxic smell so you have to be wary of that, especially if you have animals around neither you nor them can be exposed to it.Meaning you might want to test paint a room and see if that solves your problem.Good Luck!

Talk to your tax advisor/preparer to see what type of a loss if any you can take regarding a negative impact from the sale.

If you can't satisfy this 3 point test, there's significant risk associated with pursuing an STR strategy no matter how well the project underwrites today.

My partner, Will, and I are preparing to get into flipping in the Berkshires of Massachusetts in the coming 6-12 months.

This first one is the test for me.

Perhaps, your PMC needs a better lease or an addendum to cover issues like this.PMC should send a warning letter that clearly outlines repurcussions of what will happen if the tenant doens't comply.YOU must be prepared for the tenant not paying, requiring eviction and any potential retaliation damage to the property.

Once you have a shortlist, sign up for an account with each one and test them extensively to see how they function.