If you are thinking of just buying and holding one larger asset (or a few smaller ones), you could take out mortgages against the three properties and use that money as down payments towards new assets.

Meetups + books + podcasts are the way to go, but meetups are the most crucial to your confidence level and to know people like you do this every day.I agree with @Nathan Gesner on the heads up, when you say you are new and want help, everyone has a pitch, that's why meetups are so good - most have no pitch, just networking, unless it's run by a hard money lender.I have a couple friends who invest in the Lehigh Valley that I can connect you with when the time comes.

Also, check out local real estate investment clubs or networking events.

While you aren't going to have investors, i.e. it is very unlikely but not impossible, that people will commit to a deal before you have identified one, you do want to grow your network of possible LPs and nurture them.  

Bigger Pockets is a great place for education and networking. 

Most of what they recommend only makes sense from an operational standpoint if you are a larger investor and have a team to help you manage everything.Also, ensure your REI-savvy tax pro and your REI-savvy attorney link up during the entity structure creation process so things are optimal on all sides.Just something to keep in mind as you're beginning this journey.Answering your question, you'll want a checking account (minimum) per subsidiary entity and for your parent entity.

I thought it would be extremely formal guys with briefcases and way over my head. i felt it rapidly grew my network, knowledge basis, and confidence that has propelled me to be successful in acquiring 300+ units over the last 4 years. 

When networking on BP or in person, being clear about your goals will make a big difference.Are you mainly interested in finding rental properties, connecting with other landlords, or exploring specific asset types?

if you're not already, go to meetups and network. 

However, you can choose to do a Cost Segregation Study and instead of depreciating the property as a whole you depreciate each piece of the property some of which have a shorter lifespan and that allows you LARGER deductions sooner!