For instance, one broker might be able to get you terms that another cannot (so it pays to shop around).

This is an instance where step two needs to be lined up before step one.  

For instance, in California the following ABC test is used to make the distinction: A) The hirer actually and contractually does not control or direct the person in the course of their work; B) The work performed is outside the hirer’s normal business; and C) The worker also normally and independently performs that work for others.

I've been managing hundreds of rentals for 12 years and can only think of a couple instances where a pet caused more damage than the deposit would cover.

For instance, he identified the load bearing walls when we walked the property, he understood where the existing plumbing was, and where new plumbing would need to go, he assessed where HVAC ducts were, and where new ducts would need to be routed, he understood the changes that would need to occur to the electrical system, etc., etc., and he understood the costs of all of those issues.

I take it you did not spec the job out in writing and may have just said, re-tile my bathroom and etc... leaving a lot open to interpretation by the workman.I take it you did not inspect the work on a regular basis as it was being completed.Tile over tile is sometimes done--but in this instance, the installer is obviously not well enough skilled to pull it off.And the black grouting looks like the worst grouting job I've ever seen.You can rent a jackhammer from many Home Depots, and bring that wall down to scratch plaster, or whatever is behind it.A cup of coffee and a Saturday morning would probably get it done, then it's just a sweep up job.There are companies that specialize in redoing bathrooms, they will have pics of their work and if you pick an established one with a good track record, the workers they send over might do a good job.With the water lines going out and back into the building, and the electrical switch (non-code complaint outlet as no little doors over the holes, and wiring appears to be outside a metal (non-UL looking) (possibly homemade) surface box and plastered over).

For instance, we get 4-14 highly motivated seller leads per day.

These guys are famous for coaching people to open multiple credit cards and then maxing them out to pay for the $50,000 coaching. 

I started looking into marinas for instance.

In most instances the trustee will require the property to be listed with an agent and sold.