HELP. How to form/run partnership on 6 unit building?

[Timothy Swenton]

Hey all! So looks like my first deal is around the corner. And my partner/best friends second deal. 

We wanted to ask some input from experienced partnerships on how to set up and run a partnership in a deal. We have run the math, we know its solid etc. We have a hard money lender(my family). So how do we go about planning even bank accounts and pay? Should we stick the complex in his already established LLC or make a new one? For cap ex should we have a combined savings to save into or just honor system? What do we do about the buildings accounting? Etc etc etc....

Background on us: We have been best friends since we were born(parents went to college together). Were both 23, he has a full time job he does well in and  a 4 plex already. I have my own small retail hobby business. We work super well together, we have a very similar moral, financial, and business mind. We are open to anything.

Thanks in advanced to all the input!

-Tim and Garrett from Maine

I will "tag" Garrett in this post if I can figure out how