Advantages/Disadvantages of taking on a partner for flip

[Samuel Watts]

Hello, I have been flipping full time for a couple years now and now have a successful business doing it. Recently I hired an employee who is acting as project manager and also does a lot of the repair work himself when needed. He has mentioned that he would be interested in helping fund some of my flips in exchange for a split in the profits. 

I currently fund the majority of my flips with my own cash and can use a hard money lender if needed and I really don't see any advantage of taking him on as a partner, but I may be viewing it wrong. I can borrow money from a HML for around 12%. If I partner with him I will likely be splitting everything 50/50 and I would lose a lot of money by partnering with him. I also don't want to lose him as my project manager because it has been very difficult to find someone I can trust and he is very trustworthy.

Is there a way you have been able to make partnerships work for a flip when you don't need help with funding?