Most hosts want co-hosts who understand the different platforms well, understand how to market listings and how to manage guests, cleaners and trades people ie they are looking for highly experienced hosts to act as co-hosts.
What experience do you have as a host @Amber623 ?
No-one can answer how profitable it might be for you as it will depend on what demand might be for your services, what sort of properties you take on and how well you market your STR management company etc. What research have you done into your competitors and what sort of advertising you need to invest in to reach hosts you have identified as your target market?
For me it has been profitable.