In any case I'm just trying to get a solid plan together so know how much money I will need for up front costs before I pull the trigger and get a loan.

By taking it out from under the 401k umbrella, under the rules you are triggering taxes.Never think that a 1031 exchange is saving you taxes.

Just by reading your post it sounds like you need to learn a little more before you pull the trigger. 

You may wish to confirm that the new 401k provider will handle the ongoing compliance support such as any required 5500 filing (e.g. 5500-EZ for a one-participant plan with assets in excess of $250,000), any required tax reporting (e.g. 1099-r in the event of a distribution or in-plan Roth conversion), mandatory plan updates and amendments, etc.4.

Happy now to have pulled the trigger on BP and cant wait for the next step.

We have been looking into short term rentals and researching, getting close to pulling the trigger on one or two. 

You will want to 1st reach out to an attorney with knowledge in these types of transactions, so that you are in 100% compliance, at the state level.

I think sometimes everyone forgets that RE is a local thing and not all forms work in all cases without some customization to insure compliance. 

First, if the lender finds out, they can trigger the "due on sale/transfer" provision that is in almost every residential mortgage note. 

What I am hesitant about is pulling the trigger and what the process is once I find a place I'm interested in.