He stated best price was $600k, but knowing he really want to sell, I only agreed to pay $470k (Seller brought building for $420k during 2010 from bank. 

I strongly suspect (without even seeing your loan docs on your personal loan), that transferring it to your LLC might trigger a due on sale clause and the bank could call your loan, if they ever found out. 

There are tons of local banks doing loans for flippers just like HML but at much better rates and cost.

Refi (Yes Dave R is spinning in his grave or I'm sending him there more quickly)  Refi and consolidate debt on one or two properties and then apply all cash from every source you got including banks you can rob and lunch money you can steal from your children to that one loan.Paying of debt is a very good goal. 

How old of an appraisal will a conventional bank typically accept?

@Sandy Hu I used to have several with Bank of America but in the down economy they bailed on all of them.

@Ken Catron My understanding is she could get a 5% down type of loan, but typically banks and all lenders want to know you will occupy.

Many institutions want to see  you own the property for a year before they would refi at 80% of the appraised value.Is the rehab money in the bank or will it be borrowed? 

The banks are saying I can’t do that with investment properties.

Can ABC,LLC then be controlled by a parent company later that does not meet the requirements of the bank?