Advice please: New Desk Compensation

Hi everyone, I’d appreciate your advice on a situation I’m facing.

I’ve been asked to build a new cold desk in Life Sciences, starting in October. (This came up because I expressed interest in doing so should there be an opportunity to do it)

I started with this recruitment agency in April, specializing in Healthcare, and I’ve billed over £33k across 5 deals, with 3 of them just last month. I’m averaging an extra £1,000 per month in commission, and I expect to improve on this. I also have about 2 years Rec experience before this too!

However, starting a new desk means walking away from this steady commission, and I know it could take 6 to even do a deal and like 12-18 months to be consistently profitable. It’s also a bigger risk since I’ll be starting from scratch in a new sector.

A sales manager I know suggested negotiating for an extra £1,000/month for the first 6 months to cover the commission I’m giving up while I grow the new desk.

My questions are:

Is this a reasonable thing to negotiate? If not, what else could I ask for? Am I wrong to think I should be compensated for this transition, or should I just take the leap at my current rate?

Thanks in advance for your insights!