Utilizing Profit First for REI - lump rental LLCs $$ together?

[Shannon Brill]

Hi BP members!

I've recently been introduced to the Profit First for Real Estate Investing methodology and I'm excited to implement it! HOWEVER...I've always been told that I need to have separate checking/saving accounts for each rental property LLC to keep from commingling the accounts.. PF recommends if I have several LLCs that are similar businesses (i.e. buy and hold rentals) I can use the same accounts (Income, Profit, Owner's Comp, Owner's Tax, OpEx, etc.) for the LLCs in order to see the overall health of my rentals. Great!!! That's what I need, butttt here are my questions:

Would this become an issue if a tenant decides to sue? 

Do I just need to make sure I have a solid system to accurately track income and expenses for each LLC now that they are financially lumped together?

I'm also leaning toward utilizing Relay Financial in setting up the PF accounts.  Any pros/cons with this online bank?

Thank you in advance!!!  ~ Shannon