-Alts are a big part of the server and how people make money so removing them all together would have major backlash from the people that dedicate to the server and to the people that have been using them for years (me included) this would be game changing. this is something I would not recommend.
-Limiting the alt number (maybe 3-5) could be better than just fully removing alts from the server. you said "one account's printers you can make approximately $200k an hour, however some players who have 10 alts or more can make $2mill an hour" this would change the pace of money making in the community from 10 to 3 maybe 5 printers from 2mil to 600k-1m, this might not seem like a big difference but in the long term would have a massive impact on the economy and on how fast it is growing.
-If you are persistent on having alts fully removed from the server (1 account per person) then I suggest an economy wipe (money wipe) and this would restable the economy of the server and I think this would help the IRL trading issue the server is having.
I at least hope you take what iv said into consideration as this would be a massive change, this are just my thoughts and opinions.