I get it...But then you need to come up with some seriously amazing marketing idea.. be it mailer piece, or.. well anything different from the norm that will draw attention.But if you are just going to follow the herd, sent a yellow postcard with I want to $BUY$ your house...seriously.. you are winging it.

I want to run with a herd. 

Picking a % because some stranger at one point "said it" is ABSOLUTELY no reason to adapt them.Look , if you are going to blindly follow the herd you will most likely end up where the herd is.And look around you.

Get prepared to actually buy something.Now, if you decide to assign it to a buddy in your local RE herd that you run in, that is cool. 

I'm looking at a duplex that currently has separate furnaces, both being boilers with radiant heat (radiators, not ceiling, floor or baseboard).

1 ) consider plug in radiant heaters for the bottom unit so they can control their own heat.2) I like lump sum pricing all utilities included.

You just have to have strict criteria, be a disciplined investor and stick to it, don't follow the herd just because you want a deal

Floor furnaces, central heat or radiant heat?

Joe,You can thaw PEX the same way you should thaw any plumbing - with radiant or convection heat (not direct flame).

@Ryan Cauzza Whatever you do, don't 'follow the herd' (pun intended) and do what everyone else is doing.