Well, if there is a monetary spending limit, it might come down to a choice like that, assuming Yamo would take 350M/10 from BOS over all others and Monty plus Imanaga would sign for $350M combined with BOS as an alternative choice for Brez & Co.
I'd take Monty and Imanaga for $175M/5, each over Yamo for $350/10.
The lux tax might be double for 5 years, unless we can defer money, but it looks less riskier by spreading 5the risk to 2 players, not one, and going 5 years not 10.