Split percentage huge, but look at other stuff too. I am part owner of Keller Williams here in Wilmington, NC. We have 5 owners and we are all agents.
I went to KW from the leading boutique firm at the time to build a team around a neighborhood website concept. The other firm would not let me do a team. As the market shifted, I wound up becoming an owner too.
The KW concept is once to help you build individually and as a business. Whether you want to work as an individual, on a team, or have your own brand under the KW infrastructure is up to you. I migrated to the latter.
There needs to be some split to pay for the education, compliance, accounting, equipment etc. We have decided to go with a lower rent office that gives us the ability to have low costs that we can share with our agent partners. What that means is that we help you reach 100% quickly as we have an incentive to get you there. Also, we have been profitable every month since opening last April and we profit share our agents.
Most importantly, you should visit a few offices that seem to have a personality profile that fits you rather than forcing a fit with one who you think you would be a good fit for...Changing is not very fun.
If KW was of interest, I would leverage the 3 websites we give you and leverage the "Greener Grass Real Estate" branding and costs that you have already invested. Build a brand with the vision you see is a best fit for the area while leveraging the infrastructure KW offers allowing you to focus on the business of real estate and not the infrastructure of running a business.