Benefits
As a host entrepreneur, you can benefit from fresh ideas from a motivated new entrepreneur on your business. He may have specialised skills or knowledge in an area you do not master, which could also complement yours. Most host entrepreneurs enjoyed the experience so much that they decide to host other new entrepreneurs afterwards.
It is really a win-win collaboration whereby both of you can also discover new European markets or business partners, different ways of doing business.
On the longer-term, you will benefit from wide networking opportunities, and, possibly, decide to continue your collaboration, possibly as long-term business partners (e.g. joint ventures, sub-contracting activities, contractor-supplier relationships, etc).