....are available.

Similar to how MIAs work, where you can create a contract for $525k when there are no credits available, I would propose that you can launch a jail using cash in these scenarios in the same way.

I would imagine it would cost a little extra but would help keep things ticking over in times where there is no liquidity in the marketplace.

Seems quite straightforward to me, but as ever, feedback is welcome.  

Flashes a thumbs up.

See no reason why this can't be a thing, as long as there's a slight markup as is with the MIA cash option, like Larry said.

I remember the days when my Paypal was littered with 99cent transactions, back when I was single, carefree and without financial responsibility. 

I see no reason why this shouldn't be a feature, the credits serve a higher purpose than jails these days, for MIAs and perks. Offering the same functionality as MIA's for the jails should be a thing. 

From a realism point of view, a bribe is a bribe, and the warden would be after cold hard cash to lockdown the jails.

I also think this is a wonderful idea.

affirmative. 

This would be a pretty good addon to my opinion.

Yeah defo I agree with this.