"Ignoramus1064" wrote in message
...
Is that reasonable?

That depends on where you are and how much work needs to be done
on your particular house.( Are they running new supply "lines"?)
Why not call other companies for competitive
bids on similar products?
I'm in Houston and $5000. doesn't sound like "a lot". I recently
had to replace the condenser/compressor unit (outside) for
$1800 which was the middle of the three bids I got.
McM