Oh, no... I don't goof around with stuff like this... I'm very serious...
We'd need about 500-600 acres of total farmland I think for about 25,000 people... While I am confident that my 40 acres would feed 1000 people per acre, it would take a long time to get started, and it would need to be staffed very well with people who are knowledgeable about greenhouse gardening, hydroponics, and aquaponics.... Everyone needs to get used to using bicycles again, or we need to figure out some way to do public transportation, which means building roads or at the very least, elevated rail - the latter being my preference because we'd have to destroy less land to install the rail system... think Disney World's People Transporter Monorail train.
As much as I'd like to think all Ron Paul supporters and lovers of Liberty are peaceful people, we know that's a pipe dream and we'll also need some law enforcement and a requirement - a la Switzerland - that every able bodied male be armed with full automatic rifles, and that all able bodied women are properly trained in AA fire, and other long range weaponry. As much as I'd like to believe that women are capable of fighting on the front lines, even most women readily admit that they'd wet themselves if they were staring down a bad guy... Ladies, there's nothing to be ashamed of there, we're built differently, and when it comes right down to it, I'd rather have you back home making sure the sick and injured are taken care of, rather than you sacrificing your own life on the front line defending against an invasion... That's what men were made for, to defend you... Brains, equal... Brawn, not so much...
Also, we do need medical staff, at least two hospitals, a fire department - on rails?? - back country roads, farmers, scientists, industry, commercial enterprise, veterinarians, teachers - Libertarian teachers, NOT LIBERAL teachers - schools, and a monetary system that cannot be corrupted, and cannot be counterfeited.
Ultimately, the Constitution and the Declaration of Independence are the two most perfect documents ever written in the history of man since the Bible... We should use both documents verbatim, and add clauses that further explicitly prevent our own elected officials from becoming corrupt, power grabbing, lobbyist loving, tree hugging, batshit crazy, sandal wearing, religion bashing, liberals.