Managing finances for multiple STRs (how to run a business?)

[James Merritt]

Right now were 3 STRs and looking to getting more. This is what I'm wondering. Right now each property has a bank account set up for it where the mortgage comes out of. 2 of the three have the utilities and expenses coming out of their own accounts. The other one was our old house so some utilities are coming out of our personal account. I plan on changing that one to where all the utilities come from its own account also. That's 1 account for each property and there is a 4th account for taxes, escrow and repairs. 2 properties don't have taxes and insurance coming out of the mortgage. 

What I am thinking of doing is this: At the end of the month come up with all the expenses and figure out the profit for that month. Take all the profit and divide it into 25% to our personal account, 35% for additional properties, 30% for taxes, escrow and repairs and 10% to leave in the individual property accounts or for an expense account for supplies. 

I feel like plenty of people have already figured this out, so there is probably no reason to reinvent the wheel. Any suggestions or explanations of how you do it would be appreciated.