Yes, I think that probably is the most important question. There are several questions at play though, and I guess I'm trying to figure them all out. But I'd agree that the issue of prudence is the most significant. If it's not prudent, then I don't even need to worry about the audit question. The questions:
First, is it even allowed to be considered, or is it prohibited? (I don't think it's specifically prohibited based on name)
Second, if it is allowed to be considered, will it be prudent? (seems like it would be circumstantial - I think it could possibly be argued to be prudent)
Third, if it will be prudent, is it a qualifying asset? (not sure - maybe sometimes yes, sometimes no?)
Fourth, if it is not a qualifying asset, will the requirements for waiving an audit be met? (would need to be under 5% of assets, because, as you point out, bonding might be difficult)