I replaced a 40 gal recently (this month)with new venting at about 25% of your cost (heater, venting, and labor) using a licensed plumber (not my handyman) but I have no idea what the cost difference between standard size single unit heater and the size you are referring to. 

Something that size, if you don't have big pockets, is usually best served in phases, where you can get some money coming in and, more importantly, people living at the site so that other people are encouraged to buy as well.

As mentioned above, there is no "one size fits all" strategy or way to go about REI.

They provided a small chart reflecting the Top 5 but I've expanded it to include their entire list. 

If you cannot confine printing to one block -- draw the area on a legal pad, identifying all streets, alleys and property parcels with structures, size and shape of structures and vacant lots.

The dog, Bonnie, despite being small-medium-size, has developed a habit of reaching for food items on the counter, and despite lacking opposable thumbs, had apparently turned the gas knob.  

The condo itself was cheap compared to same-sized units in other places without board-ups, so I was willing to take a gamble if it wasn't for the potential insurance problem.

@Maverick Pate]I'm investigating the exact same thing.Some companies will send you these homes, with various sizes, pre-assembled.

v=yyGKTKSKCiU&t=124sGives you the Historical chart to ponder over. 

@richard morenoI think it was loan size.