Seems okay.. Yeah, negotiate directly with the contractor for lowest deal. You know your house and how best to route the cables. As for pricing for custom wiring, others can chip in.

Are u serious to put router near to ur bed?

ask how yr neighbors do it.

some houses, the cable come from the house front to grdflr, some from the back to top flr.
that will determine how long the total cable run will be for where u want it to end with the BTU (modem) - the cost for u.

if your house is small, good chance wifi will cover nicely most places, incl yr pc upstairs.
but if it's large superlink 100x30ft... tough.

note the STB (unifitv box) will likely be in living room beside yr tv, will need ethernet connection; ethernet good for yr smart tv too.

if u place the router upstairs, u will then ask "how to do unifitv with wifi"

do not make the mistake of placing modem/router in a poor place only to struggle with bad wifi issues later.