we need to Build an App the scan a room then render different Finishing specs on the room

Job ID: 36224109

Budget: $1,500 – $3,000 USD

we are not settled yet on the language but we are mainly considering flutter.
in general we need the app to scan the dimensions of a room, then build the room graphically, then apply different Finishing specs on the scanned room.
What we need is:-
Estimation of the time needed to build this feature.
Suggestion on a language suited to build this feature.