Well Mimi, you've got yourself a project. Congratulations and you'll find a lot of good resources here to help you along the way. The bones of an Endeavor are usually pretty good, these boats were built before anyone realized how strong fiberglass was, so they tend to be a bit overbuilt, but that's a good thing.
About this outboard engine idea. You're not the first nor the last to consider installing an outboard on a larger boat, as other have noted, this generally doesn't pan out. By the time you have read this, you have already read a number of good reasons to stay with an inboard, except perhaps the most important one, it just won't work.
In order for any engine to work, the prop has to have clean water with out turbulence flowing by it. This just can't be achieved with an outboard on the back of a large boat, they don't make shafts long enough and if you mount the motor low enough to get a good bite into the water, it will be flooded in a following sea. That will ruin the outboard. The alternative is to mount the OB higher, but then the prop will not be deep enough and in any kind of a chop the prop will lift out of the water, over rev, and than stop suddenly when it hits the water again. That's bad for the motor.
So, look at getting the motor rebuilt or pick up a used motor.
For sails and other hardware look to the consignment shops. There are often good deals on used sails, winches, and hardware. And of course there is eBay.
If you are needing inspiration, and there will be days you will need it, take at look at this YouTube channel,
https://www.youtube.com/channel/UCkYfFeySHGN4DPrOc9So7PA. Start at the beginning. Nike, a German woman in her mid 30s, bought a project boat in Panama. Well worth watching and her adventures.
