100% Tier-1 Gogent
If someone invests 50% of the value / capital of a company then they are an investor and ideally have deep liquidity to risk.I think the best option is to find a person with capital to bring at least 50% to the business and make him manager. People react differently when his money are involved as opposed to just gambling other people money. But I do not see why would you start a business for which you do not have or staff to proceed with?
Workers don't usually do investment deals as part of their job role. They invest to realize returns.
You'd be very hard pressed to find anyone to take such an offer. It's essentially handing over their money and then attempting to work themselves hard to recoup their money. It's like investing twice into the same company. Only way this works is where the company is actually large and 50% is sold off for way undervalue and there is still a lot more potential unrealized and where the manager is borderline crazy.