Unfortunately the answer is no. The single cylinders do tend to be noisy. Be sure there is not a leak between the muffler and engine block.

Yes, you need a door to the accessory bedroom wing. No one wants to see anyone in pajamas when visiting. And, your son is getting older. No one wants to see him naked anymore, it's not as cute as when he was two or three. I know his fiancé/new bride won't think like it. I wouldn't say NEED, but it is a good idea that'll cost very little during the build. (I love reptiles). Not me. We've tried hard and have been unable to keep them alive. Mrs Pete -- Laughter! A water change with each flush? Call it fish training. Swim against the current, or be swept away. Makes 'em tough.

Katie66: you have to take contractors' style/decorating opinions with a "grain of salt"... most are men with a male perspective. I am not trying to be offensive since there are men who have awesome "eyes" and decorating tastes...I envy people with that skill since I struggle...I'm not hopeless but it does not come easy or naturally. Those gifted men, I think, are the exception not the rule. I would feel sorry for the remodeling women who took my husband's opinion on decorating, colors, or finishes...he is opinionated, for sure, since he knows what he likes; but that does not make it stylish, practical, or put together. I will share an example. My husband was not convinced that a counter height bathroom vanity really was acceptable practice 30+ years after we last picked out a vanity. He asked every workman (contractor, carpenter, plumber and electrician) who came into the house what they thought. The consensus was that they had never heard of such a thing in 2015! Good grief! The next time we went to a big-box store, I pulled out my trusted tape measure and pointed out the unreliability of his "experts." You have done your research...they have not! Come here for awesome input if it helps validate your vision.

Where is the washer/dryer? and water heater/heat/air. Is there a basement I'm thinking no since its a beach house. Upstairs I like the 2 bedrooms and bath, but for the master way to big for my personal taste. I would put a BATHROOM in the master bedroom. Downstairs seems odd to me I would delete the (what I'm guessing is a couch in the kitchen) and make the dining room more pronounced put a window where the dining room table is at right now. The downstairs bathroom looks out of place. Imagine this I'm watching tv sitting in the upper chair in the living room and I'm hearing the person pooping since the toilet is right next to my ear. Need more info if there is a VIEW from anywhere in the house to place windows accordingly. My crack at it (there could be millions different configurations) Please provide more info and I'll mess around and get you more renders if you like.