How Rich Is Dr. Doofenshmirtz - The Lab Coat Billionaire

Sources:
https://transportist.org/2011/06/22/dr_doofenshmirtz_toll_entrepre/

https://phineasandferb.fandom.com/wiki/Heinz_Doofenshmirtz

https://phineasandferb.fandom.com/wiki/List_of_Doofenshmirtz%27s_schemes_and_inventions/Season_1

http://www.coastergallery.com/2000/dorney33.html

https://disneychannel.fandom.com/wiki/Dr._Heinz_Doofenshmirtz#:~:text=Heinz%20is%20a%20multi%2Dbillionaire,receives%20from%20his%20ex%2Dwife.

https://www.alibaba.com/product-detail/remote-controlled-electromagnet-price-7-ton_62073919992.html?spm=a2700.7724857.normalList.100.342279f4KLxg60

https://phineasandferb.fandom.com/wiki/Doofenshmirtz_Evil_Incorporated

https://en.wikipedia.org/wiki/Bertha_(tunnel_boring_machine)

https://www.space.com/41596-nasa-icesat2-earth-ice-satellite-september-launch.html

https://www.nextbigfuture.com/2019/12/spacex-starlink-satellites-cost-well-below-500000-each-and-falcon-9-launches-less-than-30-million.html

https://www.businessinsider.com/elon-musk-los-angeles-homes-real-estate-portfolio-photos

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