Only thing I see missing is utilities, common for these properties to only have 1 boiler, especially if on oil.

A HELOC is secured against (in this case) the primary and can be utilized for either a proportion of the down payment or (if you have enough equity) the entire purchase price. 

The best system is to utilize both a domestic asset protection component together with a carefully crafted Cook Island Foreign Trust to help build a legal fortress, keeping them safe and out of the grasp of predatory creditors and the U.S. proactive judges.

Educate yourself on utility assesments also. all of the above can make a good deal bad fast.

Comes with two trailers (a 1977 3b2b and a 1984 2b1b) already on it with utilities set up.

Moreover, I assume the utilities are not metered separately.

If your unit is larger than 2 bedrooms you will probably want to utilize a fluff/fold service unless you have large commercial laundry machines. 

@J Newman Are you looking for submetering of all utilities or just water?

It's important to keep your utilization under 30% of the credit line and it might be a good idea to show a small balance periodically.

An "agent" should be utilized as a go-between to get a sale negotiated, as well as all of the necessary paperwork once a deal is reached.