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Money Farm I

"Money makes the world go round."

WARNING: this uses a trick that is game breaking. Use at your own risk, don't ruin your fun in career!

This rig exploits the fact that Ore is much cheaper than Monopropellant.
It uses 21 Convert-O-Tron-250 to transmute ~32k Lead into ~63k Gold, err Ore into Monopropellant.
This yields a profit of about 75,000 kerbucks per use.
With a level 1 engineer this conversion takes about 2 hours.
The Ore is already stored, no need for drilling.
Some ore is wasted on running the fuel cells, so deploy this during the day for higher margins.

This version is optimized for a low level engineer.
If you want to go full blast with a 5 star engineer you should use Money Farm II or you will run out of electricity.

Shoutout to BitterComplaint whose 'MonoProp Mining Rig' inspired me.

Money Farm:
Delta-v: 0
Mass: 530.391t
Launch price: 499,004
Recovery price: ~566,500

Business plan (Kerbin):
- Launch from KSC Runway, bring an engineer
- Conversion starts immediatly
- Roll the Farm off the back of the the runway (gently!) to free it up for other launches
- Set alarm when conversion is finished (depends on level of engineer)
- Hours until finished = (32,500 / current ore use per second) / 3,600
- Roll back onto runway for 100% recovery
- Profit!