Credit is 800+.I have ~$120k in an inherited IRA that I could liquidate as well, but would prefer not to if at all possible.House #3 is least priority and could be used to offset the cost of the buyout on #1, but it cashflows so if I can keep it that would be great.I know it's a tough rate climate, but I'm looking for any creative options, and lenders who operate in all three markets that could help streamline the process. 

One property we bought had a bad fire years earlier.

Get a first position line of credit larger than what you plan on using (Ridge Lending has the All in One that would be perfect for this strategy).

I have a single-family home and it is going to be vacant for roughly 3 months, what steps do I need to take to make sure nothing bad happens to the property during that time?

You have to calculate based on a more than a few things like loan amount, down payment, taxes, Insurance, (Any HOA) PMI, based on credit, etc.If you are 1099 the Bank can look at the most recent 1099/Schedule C if you have been in business for 5 years or more with a 25% ownership in company or more. 

Credit.

Yeah I have been watching the deals that come through and I am wondering how long it will be before IV gets stigmatized as being the place with the overpriced, bad deals and investors start ignoring the emails? 

Depending how bad they are, I would paint them myself.

The ones that went badly were when a tenant met the inspector at the building (without our knowledge) and created issues.

If you have equity, income and good credit, any lender will do this.