[Junior Guru]

I can't remember exact figure for carpet plus install as it was done at the same time as numerous other items and paid on a few different invoices/times (deposit, order, completion).   Our bill for that trip was around $40k and we had lots of stuff fixed, replaced, etc. such as slide seals, Aqua hot etc.  

The carpet we chose is one of the brands they normally use, Fabrica, and with the original design pattern, which adds to the cost of both carpet and install (as pattern has to line up perfectly to slide floor edge) Except we chose a higher dense and more plush pile that ended up being way more than we were originally quoted.  We didn't realize the cost diff due to mis-communication issue or we would have put a less expensive option in.  But we loved the end result.  

Regarding other items.   My opinion... Whatever you think it will cost or amount of time to fix things, double it.  That's because unless you have really thoroughly inspected everything, some issues uncover others while some just take more time or cost more.  If you're good with that then at least your expectations are reasonable.  

Some things are best left to newell IMO, such as slide seal replacements if needed.  But if you are willing and have the time to do work yourself there are lots of people here that can help.