Should be able to. The price might vary.
No. They have a population that will need to continue to carry on economic activity so that they can eat and have shelter. They will produce the type of surplus that capitalist vampire squid feed on, so no shitey experian report required.
South Sudan (aged 10) has a public debt of 65% of GDP, which is in single figure billions, so your already poor analogy is not supported by actual real world facts.
Do you mean the scare stories about big queues of brown people coming for our benefits. Or the bad continentals forcing us to put meat in our sausages.