Boutique prop trading firm?

Currently working at a FICC desk in a BB. I have been interviewing with a boutique prop shop (around 50 employees), that doesn’t specialize in my markets.

I thought they wanted to hire me to trade their markets, but what they want is someone to set up a desk that trades what I have been trading at the BB.

I would have to set it up from scratch. Their expertise in this is very limited. I have around 5-7 years of experience but have always worked at places that already have expertise in what they are hiring me to trade (so i have been part of teams and already established structures).

They will match base pay and the bonuses on prop can be much higher (basically offering 5-10% of book), but obviously the risk is higher if I don’t perform after a few years. They seem chill about that, but IDK if I am setting up myself for failure or if this is a crazy move.

Thoughts? Thanks