For many years, I nearly always carried two dinks and two outboards. Not equal, of course. But if I lost the principal one, or its outboard stopped working, I’d have a back up. One has to decide where the weak links are for a successful cruise and service them first. A roll up 8.5’ (less expensive PVC) inflatable w/a 2 to 4 hp outboard stowed below as back up to the main one would come before many other things people think they need to be “well outfitted.” Right now I have 3 dinks and 3 outboards, but lately I’m carrying just the 9.5’ inflatable RIB w/the 5-hp Tohatsu (4 stroke). It depends on where I’m cruising, and what services are near, what I carry. There are always dinks and outboards on craigslist. True, some may be a bit worn out, etc. But not all of them.