FINANCING OF WORKING CAPITAL

Hi, I was wondering why financing of working capital using short term would be any cheaper. let's say this can be done through either delaying payables or borrowing overdraft. suppose we are delaying payments from suppliers- this is effectively running the risk of missing discount offered by suppliers and most importantly lead to lose of supplies in the long term. this is double tragedy. suppose it was overdraft borrowing- there is the interest payment at varying rate as the financing might be done frequently. so the cost of interest subject to change in interest rates is a huge bet (yes it might change in our favour but it has equal chance of going against us too!). But if we were to use long term borrowing the cost of interest is inevitably the cost of equity/debt- the capital. Amazingly this is fixed. on top of this, another risk might be the risk of foregoing purchase of plant. Here we are not imparting attached stakeholders like we will do in payables or neither will we be on the fate of changing interest rates like we are in the case of overdraft. For this reasons i feel the long term option is cheaper. thanks,john.