When he became incapacitated and could no longer visit his unit, approximately 7 years ago, another family member, who had assisted him in maintaining the building, began utilizing the space for storage, vehicle repairs etc.

Both vehicles belong on the scrap heap. 

I have heard that getting funding for MH's is difficult due to them usually being treated as a depreciating vehicle and not as a permanent structure. 

Both vehicles have pros and cons and the optimal portfolio has a combination of both.

The properties are owned by our LLC.Assuming nothing changes from the current tax perspective, what is the "smartest" tax-efficient method of getting this equity out of our investments:1) Cash out refi $1.6m (80% LTV of all the assets) and invest that money in a more liquid (albeit lower return) investment vehicle?

You can use any toxic combination of cleaning chemicals and it won’t damage the floor.

It is an asset protection vehicle if managed properly. 

I section 179 all my company's vehicles.

My wife and I are real estate newbies, but have been investing in more "traditional" investment vehicles for several years now.

I need a vehicle to find and drive sellers to me .