HML question on payments

[James Sargent]

I am trying to figure out exactly what I will be paying back or monthly on a loan and for those who have gone this route to offer some advice.  

Ex: 100k loan for 12 months @ 12% interest only, am I paying pack the interest only each month until I pay the loan off and how much would that be? Or am I just paying 12k on top of the 100k when I sell? If that is the case, with the 3 points included I don't think that is a good deal. I spent quite of bit of time of the phone with some lenders but failed to ask this question. Just trying to figure out what the 3's come out to. Thanks