First off I want to say thank you for posting your results, CakeFlour; as it made me think about how to work with the game and what we have available to work with so far to get that 50k Newbucks achievement. Allow me to share my results:
Attempt 1
I was just shy of the score as you can see, but a few days later and thinking things over a little more I managed to get this:
Attempt 2
I'll go over details on how I managed the score, but I'll make a separate post as I don't want to flood yours, I'll have it up and ready for viewing shortly :D