This will eliminate the "I didn't have anything in there for modifying/moving the plumbing around", etc.

Part of the issue may be whether the failed plumbing was in the common area, between floors, or was within the unit(ie under the sink) above.

Being it's a condo, I'm guessing you don't own the pipes or the space between floors, I'd make the HOA aware of *their* problem and demand they do something about it, it's a health hazard if their plumbing system is allowing sewer gas into your unit.

- implied questions (condition/age of: roof, doors, windows, trims, boilers, electrical, plumbing, units - leaking/mold issues/ etc etc)2. how old's the property?

After awhile you get a feel for example what a roof replacement costs, or plumbing, etc.

Now that you mention it, I just recalled that I have filled out paperwork to get a contractor/property manager discount at both a plumbing/electrical supply center and a local landscaping nursury.

I spealize in general home repairs my skills are HVAC, Minor Plumbing, Electric, and some Carpentry..

I'm thinking livable condition: once the carpet is installed, countertops in, appliances and plumbing working.Then after that date we can wash windows, replace/install mini blinds, mow and clean yard and do other things assuming the tenants haven't moved in yet and expense those repairs.

It did not add to the cost of the plumbing itself but in your case you are gonna have to lay a drain for the toilet in the foundation.

I'll be plumbing the Bigger Pockets depths, just haven't done a lot of research yet.