Re: 1970 16 ft tri hull need help!
Well..... get together all the supplies and a handful of ambitious friends........ remove the motor, separate the hull .......... rip out the old stuff and re-install the new stuff.
Sounds easy but it is tedious work.
You will need...... enough plywood to do the deck and 1 additional 4X8 piece. The deck can be 1/2 and for the transom you will need 3/4"....... the extra sheet should be 3/4 too.
The cheap way is exterior grade plywood, fiberglass, and polyester resin. Enough cloth to cover all the plywood and probably at least 3 gallons of resin.
[if you want epoxy resin it will destroy your budget]
Get a few sheets of 2" thick 2X8 pink or blue foam insulation for use as flotation.
Actually no one here will give you any "cost" associated with your project but..... we will guide you to resin's etc. Home depot or lowes will be fine for the exterior plywood. Some people have spent hundreds and other's have spent thousands.....
Is it worth it?????? well you will have a safe boat to play with and 700 as an initial investment is not too bad...... what year is the motor?
Trust me you will hit your wallet for many things but in my opinion....... it can be very rewarding and worth it. It will be a fun boat when your done
Oh so you have all the tools........ well I will tell you in advance that tri-hulls are the MOST common for people to cut right through the hull!!!! Be certain to set the depth on your circular saw slightly SHY of the right depth ........
Have fun!