[Porsche-O-Phile]

Case-by-case. For such a small job it's anybody's guess what the individual installer will accept. Most of the better ones take cash, check, charge, bank transfer, whatever. But due to the size of the job you're likely to get a higher percentage of bids from small-time guys who might not be so sophisticated.

Put a requirement that bidders accept "X" as the form of payment in the Instructions to Bidders if it really matters to you, or stipulate that they state what payments they accept and any applicable discounts for cash payments as part of the bid submittals.

That's my professional answer, now here's my real-world answer:

Do you really want a low-bid, probably small-time residential contractor in your home, especially knowing that you keep a large amount of cash currency on hand? Think of the backgrounds of a lot of these guys - particularly the smaller residential types and particularly their subs if they "sub out" a lot of work (which is likely to happen here).

Think about it.

No way I would.