I have heard on several separate occasions about the idea of “borrowing against an IRA” to build funds for investing, but am unable to find any more information about this when I search for it.

Huge tech grow, low taxes, and landlord friendly. 

Something to note, if you pay cash for the house and later require access to those funds, utilizing a HELOC (Home Equity Line of Credit) allows you to retrieve that money.Secondly, the right approach for investing depends on several factors.

This is of course due to current market conditions and low inventory levels.

I have started analyze the deal and am still working on the details. monthly costs are roughly $1300Potential income is between 8k-9k dependingcurrently only 1 lot active at 950/mnth9 others with mobile homes in need of repair - cost of rehab of all units could be up to 100klot rent would go from 300-400 per without homes in this area seems like a pretty high upside and not very low downside to the deal.

Should I try to find private money to fund the whole amount and refinance in a year?

There's pockets all over the greater Tampa Bay Area that are B class and up but balancing that with a decent cap rate is going to be tricky unless you either have low cap rate expectations or are will to do value add to the property or being more creative such as using a short or midterm rental strategy or even room by room with padsplit.2) Verify as well the 1031 is going to allow "like for like" into a single family. 

I like getting a HELOC on a property while I am an owner occupant, and keep it as an emergency fund.  

On the eve of closing (last night), the escrow assistant informed us that we need to bring additional funds to closing due to two affidavits that need to be recorded in the loan package, for which the recording fees were not collected earlier.

I think this is the best way to get started for a beginner, and now is definitely a great time if you have the funds for it.