Damn, I can't believe I just wrote a long post, and forgot to login before, lost it, and couldn't get it back. S**t I hate getting old. Golden years my ass. Here goes a shorter version again.
14' jet boats get very small when you get in them. The boats on the commercial market are all lighter weight hulls, and with 48"-54" bottoms. 16' boat has some room to do things to it, and in it. Most mfr's that make them in heavy gauge, use 60"-66" bottoms. There's a difference between a "formed reverse chine" and a extruded reverse chine. Extruded has very little reverse to it. Formed reverse chines are much wider, and help with lift in the hull and stabilization of listing side to side.
Only a small few Mfr's make formed reverse chines in small heavy gauge boats. Lots of Mfr's have started forming wide reverse chines into deep V boats, even though their mfr'ing style is using a extruded chine. A few Mfr's make welded tunnels, and some do make delta to tunnel feeders. Straight delta is much easier to build, so thats what you see mostly.
Unless you just need a heavy gauge hobby, you might want to consider one of the lighter weight open hulls on the market, like Tracker or Lowe (.100) You can get a 18' x 60" for $3250 area. Motor is always most expensive item.
I am the ultimate project maker, and not finisher. If you are interested in a 16' Landing craft bow boat (equal to 18' length normal bow boat), .160 material, 72" bottom, formed reverse chines, planeing strakes, 25" inboard style transom, delta to tunnel hull, 8o transom, to 14o-15o bow entry, totally open construction style (like a large dance floor), with heavier welded steel trailer. NEVER HAD A MOTOR ON IT. Bought 7 years ago to have, when I retired back in Idaho, and could just load the 4 wheeler in it, and hunt out of it. Power was going to be outboard jet, or Jetski motor and pump. Hasn't happened !! So, I have come to the conclusion, that at 70 years of age, I am never going to complete some of the projects I had planned. Its going to be for sale for $7000 for pkg. Someone will have a great project boat, but sorry to say it won't be me at this time. I am doing better, I have gone from 5 boats 3 months ago, to 3 now. My wife says as soon as I get the boat parking area cleared out, I can go back to buying more. LOL