I just finished working on it and waiting for their tech support to help me publish my website under my own domain. 

As others have mentioned you could have a conversation with your tenant(s) about splitting the cost.

If the sale goes through, we are making a substantial return (hundreds of thousands of dollars).My spouse and I want the money now and want to avoid the wait and see.

Wait, using my phone and my memory isn't the ideal?

As @Chris Seveney mentioned there is not really enough equity in house 3 to get a meaningful LOC. even if you were able to leverage enough to pay off House 2 the new rate you would be paying would be higher than the existing mortgage, so you would still be behind overall.Your ROI on those payoffs vs keeping money in index funds is not very good either.Lastly, remember that cash flow from rentals can seem good until it’s not.

The books mentioned above are a great place to start!

(Still awaiting Seller to confirm report it’s been done as she agreed to the inspectors recommendation but has mentioned she’s not replacing it) In additional to the foundation has shifted and need reconstructed due to a lot of slopping in the home (My agent said it comes with wear and tear, so they might argue that their not going to fix it so I didn’t put it on the IRSA to repair).

Property manager had pest control come and they mentioned “partial exclusion” on an invoice, and calling the pest company I found records that they sealed up those drains.

Also from what I've read online breaking into the insurance side of things sounds like it requires cold calling and building relationships with those reps vs just registering property in database and waiting.

I think the non-refundable fee is low based on the damage pets can do (not to mention tenants).