The scenario where something could go wrong is (a) if they...

The scenario where something could go wrong is (a) if they cannot rollover their liabilities at a decent spread and/or (b) existing borrowers switch their loans to another financer that will be offering lower rates.
The RBA then steps in and arranges for one of the big 4 to assume RHG's portfolio at no cost.
End results is RHG is then worthless to existing shareholders.