Sorry I missed your point, perhaps I am confused, you want to run with a 40hp for now, then you guys want to put 2 x outboards later on?.... How many people will be going out? Look most Ski Vee boats in that range older types (like mine) as per the specs are rated for 4 pax, which of course depends on the weight of pax - it can make a difference, and it's kind of an overload... so I would say from my experience, max 2 x adults... not too much working space. Then it's the fuel cans and and, I know Malboer said that you guys will just be beach launching and then not too far out, unlike Maputo's outings which is miles and miles... I would suggest you guys post this info / topic / upgrades / progress in the Ski Vee thread on Sealine, follow this link - there's other okes that's into Ski Vees as well.
Here's the link, please post the info here:
http://sealine.co.za/view_topic.php?id=79875&forum_id=19