That looks like a great project and nice lot on the lake. Congratulations, I hope it is perfect when completed. Don't under plan. Watch all your door swings, go as far as light switch locations, window placements witin walls for views, etc. The more you plan, the better it will turn out. Make a list of "Must Have" features, "Would Like" and if "Money Allows" features and then let the budget works it's wat through the list. Keep as many Must's and Would Likes as you can.
"One foot in the grave, one foot on the pedal, I was born a rebel" Petty