Having made zero income will become a problem if audited.

Lots of things can alter the equation between price and value, here's a few: does your CPA offer audit protection/representation?

You would each report your share of the income and expenses accordingly on your own tax return unless you opted to file a partnership return which is less likely to be audited. 

They sometimes do free energy audits.

Documentation, documentation, documentation is absolutely critical if you expect to pass an audit.  

Then you need someone to make sure you're audit ready because that's a new IRS campaign-the bigger the dollar amount, the more likely you're going to find yourself in an audit.

Right now interest rates are low but when they rise in future years banks will do audits on their loans to see if they can call them to re-lend the money out at higher rates.Everyone wants to maximize that dollar!

I'd suggest phrasing it a bit differently, though, if I may......ppl can only give advice about something they're impartial about and have no conflict of interest - otherwise, they're just selling you...

On the other hand, paying a 13-year old $20K to sweep the floor and empty trash cans does not seem to be reasonable and may not survive an audit. 

If they do see something like that or it comes out that their documents do not comply through an audit process, they will certainly have some thoughts.