You can not lend yourself money and not actually fund the loan.  

Usually the lending amount is a percentage based on the LTV (Loan to Value) or LTC (Loan to Cost). 

The main reason I find is that the older lien holders won't have the cash to complete the process because of the additional funds required. 

You can also do equity participation deals which are similar to private money loans, except you offer the lender an equity kicker for a higher LTV. 

Now the sellers son has decided to stay and squat at the property for another month til the end of September, with the exception all of the escrow security funds coming back to me (buyer), am I entitled to split or give up any of the escrow funds with the sellers son due to him squatting in my new property.

Try  Brandon's book on  Investing with no or low money down, it would help give you ideas on creative financing if you're low on funds

Another note for you on conventional financing for condos is that anything over 15 year fixed and 75% LTV will pick up an additional condo "hit" to the rate meaning your interest rate will likely be 1/8 to 1/4 higher in addition to the typical uptick you would see from an investor loan.My guess is that your broker either doesn't want to deal with verifying warrantability of condos or does not have experience with non-warrantable loan programs.

What I didn't calculate was that, in between funding rounds our team sometimes doesn't get payroll for 2 months or so until investment dollars hit the bank.

We are financing these with both personal funds and mostly private debt investors.  

Please see the following.There are a couple of ways to invest both your personal and IRA funds in real estate.