or have the current seller provide said info. with proof of payment and or renters insurance, turnover of security deposit & first months rent which my attorney will also be collecting, With it being such a quick turn-around with their current lease expiring I want to have as much lined up as I can and be the most prepared I possibly can.Currently Still in the process of bulletproofing the new lease along with the operating and reserves accounts & setting up account/property management software.

Arman Singh is an amazing real estate agent and LPG Management provides exceptional remodeling services and property management.

Any recommended billing service providers that service my property size in CA?

To be a real player in REI, you'll need to come in 50MM ++ and if you're at that level you focus on other things first. 

Thanks for any input you can provide!

They can also provide comps.

This can be done through linking up with local investment groups, or go to meetings that provide such interactions.

You might start with the agent that listed the home for sale as they typically know the players.

The Architect working directly for me will provide me with more leverage and peace of mind. 

I think HH provides these new home buyers the opportunity to purchase a home with some financial flexibility being able to rent out portions for extra income.