I have a solo 401(k) and the funds are held in a business checking account in the trust's name at Wells Fargo.  

Scrap metal recycling centers will pay you money for them.

I ripped out the 2 inch thick, metal lath/concrete/pink tile walls (that apparently were really popular in this area) so I am going to have to retile the entire shower already anyway. 

Continuing on, how are these accounts held?

In the kitchen, old metal and wooden cabinets needed to be removed and replaced, including the kitchen sink.

Long term if held over a year, short term if held a year or less. 

If you are that worried about not receiving the rent amount from section 8 for a few months while the process gets going, then you don't have a sufficient amount of money held in reserves to begin with, and/or should have done more research about the pros and cons of section 8 prior to signing ANY paperwork with them. 

I also don't really want it to be an outside dog, they tend to be more aggressive and I am more worried about being held liable for a dog attacking someone than damaging property.

When I was your age I was worrying about when and where the next party was going to be held.  

You are now held to a higher standard when it comes to real estate.