No, not ambitious. I'm not sure of the etiquette regarding sharing strategies while the challenge is still going on. I'd be glad to share my Sim's traits and stuff, and would really like to hear from others on this too. But should it wait until everyone is done? For now, I'll just say I followed the rules to the letter and didn't cheat. I did take advantage of a Sims 3 quirk I discovered accidentally regarding getting wishes to appear, to make sure my Sim always had lots of wishes to achieve. 
Good for you. Keep your mouth closed. I didn't intend on you laying out your strategy.
I should be done by tonight and will not top your score, so congratulations.
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EDIT: Paul is done. The last week was a complete waste of time. I finished all of the recipes and plants with 10 days still left to go — I had finished the fish long before when I went to my last foreign spot, Egypt, in week 10. So with 10 days left I took a gamble and went for the big money wishes I've seen before — Be Worth 250k Simoleans, etc. I had a Mid-Life Crisis and trained him as a tip playing guitarist, but the 500k wish never came. I would have thought it should have fired after he had 400k, but it never did. That wish is a biggie — I think it's worth over 10k Happiness points.
Oh, well. This was a fun one. It was so cool making a lot of recipes I had never made before and catching new fish I had not seen before. And the recipe side of the tourney didn't take as long as I had thought. When you're a lvl 10 cook and using perfect ingredients, the really good recipes pop out perfect on the first attempt. The lower recipes needed some remaking, but I got 'er all done.