Like yourself Toff, I would be no expert on matters fiscal.
I do however know that businessmen tend not to use their own money to finance ventures if they can get a loan at a decent interest rate.
Even in my household capacity, I took an extra loan on my mortgage to finance an extension to the house even though we could have paid for it out of our savings.
Now I have the loan nearly paid off and my savings still intact
So looking at it like that, I think it makes perfect sense to pay off loans then re-finance at a more favourable rate of interest.
(If indeed that is what happened in this case)