I'm aware that full time realtors typically do quarterly tax payments to avoid penalties and to minimize their tax burden once April 15th comes but I'm wondering if that's still required/recommended for me since I only did that one deal and also pay taxes as a W2 worker?

In the same way, if another child brings a toy and doesn't share it but it flaunting it at other children, I talk about how that is actually his toy so he can do what he wants with it, but that his behavior is ugly and he is trying to make other children feel ugly, too--he is trying to make then envious, and why it isn't his owning of the toy that's the problem but his nasty behavior and how we can avoid being dragged down with him, etc.I make sure my kids both succeed and fail.

Maryland also requires a physical address (no po box), how can I avoid having to using my personal addressMy thought is to set two LLCs owned by a single trust or another LLC in a separate state as the owner of the MD LLCs.

As a business owner, I operate at a loss to avoid taxes and am not eligible for a conventional loan. 3 My business and assets are located in CA and I pay taxes there, and I am currently located in Illinois and want to invest there.

Yes, paying the son would benefit but have to optimize the payment to avoid both self-employment taxes and child tax credit.  

Tenant shall pay for all costs associated with remediating pests from the Premises and shall inform Landlord at first sighting of any pests in order to avoid any infestation of pests.

The reason this works and avoids the due on sale clause is because of something called the Garn-St Germain Act of 1982 - there is language in there that allows you to change the property's title into an inter-vivos trust - examples of these include - revocable living trusts AND, you guessed it - land trust. 

I wanted to avoid TX because of high property taxes.

(About 25% increase in 2 years) At about this month next year, I will be moving to my next duty station (don't know where to yet), and was thinking of refinancing my VA loan to a conventional since I will have over 20% equity to avoid PMI and to free up my VA benefits to use where ever I'll be stationed next. 

You could have increased rent $70 every year and it would have avoided this huge increase.It may actually be good if they choose to give notice and move out.