I currently have 5 properties; 7 units. (1 office building, 2 duplexes, and 2 single family homes) I am currently pulling a line of credit out of my office building and will be using that to purchase a 6th property.

Technically if they called the note, would I be able to get a better rate on the next loan?

Start posting some ads and start having some conversations with these guys if you don’t get any referrals.you get a better feel when you speak with people one on one.

Could/Should the 2 LLC's be tenants in common for the new property purchase?

It explains the team that you should develop to have a strong foundation under you while investing remotely.https://www.biggerpockets.com/blog/core-four-real-estate-teamI’d be happy to connect and chat anytime!

What a lot of people think:Bonus depreciation is only for new properties or acquisitions.The truth:You can retroactively apply bonus depreciation to property placed in service after September 27, 2017, when the Tax Cuts and Jobs Act passed changing various rules.The IRS allows you to claim missed depreciation deductions by adjusting your current year's tax return, without needing to amend the previous year's returns.This is typically done through a change in accounting method using IRS Form 3115.

House hacking and multifamily homes are great options.Just be sure to know your budget and consider networking with local investors for valuable insights.

I'm only in LTRs currently but realizing MTRs may be a great addition. 

Don't DM people without an invitation.

Consider how it will be used and if the floor can function as storage, rec room, family room, extra sleeping space, etc.From what you've shared, my concern would be the "hills" that may cause a tripping issue.