Originally Posted by ian parkes
depends on size you need for the size of family . Your budget would get you a new honda or quicksilver and engine up to 4m and 20- 25hp . I don't think a sib that size will tow a wakeboard or skier easily .
Also depends on how you intend to transport it , a 3.8 air and 25hp 2 stroke are about as much as you can carry and fold down etc with ease and it would fill a large estate car
Most bigger sibs end up on a trailer and then you had just as well buy a solid hull boat
have a search in the new sib section there are lots of similar posts to yours and you can see what people eneded up with .
I had a 3.8 honda air floor with a 20hp honda engine new for about 3k that was certainly one of the best lightwieght sibs I have seen ,
Even with a small SIB and motor that can be fit into the back of a car, it is worthwhile to have a trailer for it - provided you have the space to keep a trailer. With my 11 foot zodiac, I would always set up it up and take it down at the launch site with each use. Set up would usually take about 20-25 minutes (with a foot pump), takedown about 10-12 minutes. In retrospect (now that I have a trailer) I would have used that boat much more frequently if I had it already set up and on a trailer. Nevertheless, having the ability to transport and launch it without a trailer made it much more versatile.
There are both advantages and disadvantages of larger SIBs (in the 4.2 to 5.3 meter range) compared to RIBs of the same length. The SIBs will be considerably lighter in weight and transport/launching/landing can still be done without the use of a trailer (if you have a pickup truck), but it is definitely not convenient do so. In the event that you might wish to launch from a location where a trailer launch is impossible, you still have this option with a SIB, whereas you don't with a RIB. Also, the SIB will have a much shallower draft than a RIB, allowing it to go through shallow creeks that would hang up a rigid hull.
A large catamaran hulled SIB will handle easily and comfortably at speed in choppy conditions that would toss you right out of a a v-keeled SIB. While it won't cut through 3 foot+ waves in the way that a deep V-hulled RIB will, a cat-hulled SIB will still provide a stable and remarkably dry ride - but with more up and down movement (with reasonably soft landings).