How about , going for a Large kite ; then going and Building your own foil-board ?
There are plenty of directions on the foil forum to make your own hydrofoil
with good probable odds for success .
Or "Used" both ; i seen some Good deals on used stuff !!
I'm 175 and never use larger than a 12 m foil kite. If the kite just barely hangs in the air, it's enough. You will have plenty to learn and enjoy as you work on foilboarding.
There is a BIG difference between 175-Lb , and 205-Lb ; i also weigh