Did you use aluminum sheet to make the top?I did mine with the help of two friends. Well...let's say I handed tools and drinks to two friends hehe... Took us two days and cost was under $1000. Turned out great. Pictures can be viewed here...http://www.boattrader.com/listing/1998-myacht-houseboat-102997122
Yes we used the snap together aluminum sheeting and self tapping screws. It turned out great...two inch slope with a channel at the back and sides to guide the rain off and over the side. Very sturdy and will outlast canvas by decades.Did you use aluminum sheet to make the top?