Rent-a-tame-expert is always a possibility, although not much point if he/she says the same as the expert from the other side.
Daft as it may sound, preparation of the case may have been slightly hampered by lack of funds.
As a guide, a businessman acquaintance of mine asked me to recommend a QC to act for him in a simple assault trial.
The legal bill was £37,500.
This case is more complex, and like everything, QCs probably cost more in that there London.
Incidentally, my mate was happy - the QC got him off - he would have paid almost anything to get the not guilty verdict.
One might see that as putting a price on justice, although the case wasn't up to much, and as I told him any competent criminal barrister could have successfully defended it.
For, at a guess, about a tenth of the price.