That could work, but I would have Goodwin at least start working on his painting (get a second easel) just in case. Clone Voucher is 45,000 lifetime happiness points which is a lot to earn in a short amount of time. You might luck out however if Harwood gives you good wishes. You can have an adult reach level 7 in painting in a few days if you use coffee to keep them from needing to sleep, and that's a Sim who isn't artistic.
Speaking of luck, in a second dynasty I've got going, my Sims are celebrities. Had my founder originally going to supermax fishing and top that career but about halfway through his YA life, realized it wasn't going to happen and switched him to cooking and Culinary. He's got all of the challenges but the recipe one. So I have him go buy books. Can't remember how many he had already when the thing popped up, but I selected the ambrosia one while I was there. He got it for free. He was a level 4 celebrity at the time.
My main concern right now is the lack of life fruit on the lot and Samuel is an elder. He's got 4 more best friends (but that shouldn't be too hard, he's got a fair number close to best friend status), and his elder portrait to go.
Question: Could I send my Sims to Egypt. Raid that one tomb that has harvestable life fruit, plant them and use them as the grown life fruit? I know I can't use the life fruit I harvest in Egypt for Ambrosia. Or does the life fruit we use have to come from a special seed? My gen 2 heir is a young adult so I can travel, I just don't want to doom my dynasty. My founder is an elder now and I have 6 days to get a life fruit planted to guarantee having life fruit before Samuel could die.
I also second the marriage question. While I'm not in that boat now, I might be in it later on.