Hey everyone...any thoughts on the best structure both for protections and tax advantages for a 4 person partnership?

Our goal is to build a portfolio of properties around the BRRR model using a portfolio lender.

3 people are putting up the money....1 person is actively managing the projects.  

What's a fair equity split as these aren't flips....but buy and holds?

Any tax considerations that would make an LLC the wrong container?

Finally, any thoughts on a competitive rate for a portfolio lender?  I know it'll be higher than conventional, but how much?