He further stated this is because the tank and lines are permanent fixtures to the house and the tenant would have no way of providing their own tank if they desired. 

Then of course you have permanent competition in renting or selling of the condo, and since the exterior is the same, you'd better have the best interior.

One way to make myself feel like this asset type is less of a risk is buying in a place where vacation rentals are a permanent type of asset to have.

Here in Westchester if  a dog has lived in a building more then 3 or 6 months and the Managment has NOT asked him to leave The dog gains permanent  residency even if there is a No Pet Policy

LOL  I would like to see a standing schedule that is permanent (maybe with an occassional change) where you know the schedule every week, what day, what time with the login information so you can put it on  your calendar recurring permanently for the 6 months.  

Is it maybe even possible to choose a different siding over the brick, to encase it more permanently?

Bridge loans are great for turnaround deals in particular, followed by permanent loans.

The downside with FHA is it now pas permanent PMI attached to the loan.

The HR people did each say, without me asking them, they have a frequent need for temporary housing for doctors and administrators coming in temporarily or permanently because inventory is so low for bath buying and renting homes. 

It won't be a permanent supplement to a lack of income to service the mortgage debt.