When an agent works with a client they are not just working for the clients benefit they have a fiduciary duty to the client. 

Not so much from a bad tenant perspective, but more from being reassigned to another duty station and not fulfilling the original agreement?

I would think by adding them to your current LLC it would defeat the point of the JV and all you would need then is an operating agreement calling out the duties of each member of the LLC.Also like @Steve Vaughan said wouldn't hurt to talk to an attorney.

Our city is "street by street" so having boots on the ground is vital. 

I just inherited the duties of managing our families (my in-laws) small apartment building in Hawaii.

Former active duty military so I have connections with realtors in CA, AZ, NC, TX, and LA.

An agent legally has a duty to be honest and truthful throughout the transaction, and this creates a conflict.There are some good wholesalers that make a reasonable profit on deals, treat the people they work with ethically, and are professional to work with.

Remember: Success is your duty, obligation and responsibility.- G.

I would do some of the management duties such as cleaning the unit/prepping the unit for a new tenant. 

I believe I do at least while I'm on active duty orders for the income and credit score.