Saving secured loan vs. delayed financing

[Chelsea Allen]

Hi if I am going to buy and investment property , put it under an LLC, what are the pros and cons of using a saving secured loan vs. delayed financing? The latter will have higher interest rates whereas the former has a 2% interest at my local credit union.
Since this is my first property purchase ever, I wonder how escrow accounts, etc for property taxes would work.  Appreciate any advice !! Thanks all!