How Much Weight is is Possible to Gain in a Year?

230-240lbs is absolutely possible for you in one year, provided you do things right (and that includes not panicking over gaining some fat). I went from 170 to 210 in my first year without gaining very much fat at all. Here’s a link to my first year’s progress thread:

You are not 18% bodyfat. Stop using those electronic devices, they suck. Get a decent pair of calipers and learn how to use them. I would guess you at about 13%.

Try to gain one pound per week, eating fairly clean at first, and when the going gets tough, get as dirty as you need to.