We had discussed attaching fixtures as part of the job, but noticed that it wasn't part of the written quote.

Your ALL in cost is only a cup of coffee.I am currently flipping homes in Orange County and teach others how to do so as well.

My home received an overhaul, including: new roof, full painting (interior/exterior), all new countertops in kitchen and 2 bathrooms, all new hardware and fixtures (knobs, handles, faucets), brand new cabinet door refacing.

I've attached some pictures where you can see the condition of the walls and ceilings.In addition to the estimate on the first post, I was also quoted:$21,800 for the bathroom (in the last picture) which does not include fixtures, vanity, shower, toilet, tiles.

I don't know all of the costs, rates etc, but it might be worth looking into.Hope it works out for you, sounds like you have a great start to things, I am in the Dallas areas as well, if you want to meet up for a cup of coffee send me a shout.

I find it really hard to find and compare prices for things like appliances, tubs/toilets/sinks, fixtures, etc.

Neither our contractor, nor my husband and I when we visited once a year, ever realized they had painted the walls gold, had installed a kitchen backsplash, had basically destroyed the carpeting (covered by a lot of heavy furniture), spray painted the patio, stained the kitchen cabinets, replaced a light fixture, and apparently never cleaned the kitchen, nearly ruining all the new appliances. 

Then, if you want new cabinets, countertops, light fixtures, plumbing fixtures, doors, windows, etc., you'll spend more. 

Allocated/Assigned Expenses:Advertising, coupons, Cleaning SuppliesCommon areasFood Furniture and Fixtures RoomsF&F CommonLabor, maid serviceLaundry expenseOffice SupportDepreciation and Depletion ExpensePremises depreciationLocal Motel TaxThese can be allocated to fixed and variable expenses per room and consolidated.Departmental expenses for Laundry could be washing machines and dryer depreciation (equipment) soap, electric if on seperate meter, floor space of the building for depreciation on the building.

I could go without a line upgrade if only one tankless unit of this type was installed.My question is this: should I size the system to support 100% usage on every hot water fixture in the building, knowing that it will probably never be used, or is 70-75% usage from a single heater going to be alright?