This will be consisted of 2 suggestions. I'll start with the one that I think is important.
The current price for a money printer is $5000. It makes $750 per generate. That means it takes 7 generates to pay for the actual money printer before it starts making money. On top of that, half of the time the money printer will explode, destroying any money that has not been picked up yet. On most other servers the money a money printer generates is 1/4 of the money printer's price. If we could lower the money printer to cost $3000 that would fix that problem.
The second suggestion is less important but I'd still like it if it was implemented and that is;
Upgradeable money printers.
It would be nice to have money printers that you can invest money in to make more money, or invest little money but it will make less money. Also it would require more babysitting than the regular money printers, which I think is nice.
That is all.