Door And Wall Questions

Hi,

Thinking of moving the entrance of my kitchen, which involves hacking off existing entrance and building up a new one, followed by installation of a door. My contractor quoted me the following

- To provide labour hack / dismantle existing wall at kitchen entrance . $300

- Supply labour and material to use cement plaster compound to make smooth surface area at affected hacked off wall & lay tile finish at facing kitchen area. $500

- Supply labour & material to construct new wall use 2.5" hollow block c/w cement plaster compound to make smooth surface area & lay tile finish at facing kitchen area. $700

- Supply labour & materials to install 1set of wooden frame paint in black with clear glass panels door at kitchen entrance . (L-1000 x H-2100) $1250

Firstly, wondering if his prices are reasonable for the hacking/building up.

Also, wondering if the constructed new wall is sturdy. What is "2.5" hollow block c/w cement plaster"? If I tap on it, does it sound hollow, compared to a concrete brick wall? And is it load bearing? If I accidentally bang into it with something sharp will it poke all the way into the wall?

Next, wondering why the door is so expensive. I was thinking of something like this.

For comparison, he quoted 2 bedroom veneer recon doors for $780 total. I'm guessing it's more expensive due to the tempered glass? If so, would it be cheaper if less glass is used?

Thanks!