5x FLAT 2D scenes

I have had to post this project again because the designer I picked was not able to understand and deliver what I want. Please read the below carefully.

Also, please refer to the attached images as a basic idea of the sketches of what I want. As well as an example of a background I currently use for this purpose. Note how it is very flat (floor to back wall). There is no 3D roof elements or side walls or anything along those lines. The goal is for me to put the character in the screenshot on the floor and animate it. That is what I want as outputs for these 5x designs. Pretty flat and simple designs that work in a similar way.

Please take careful note that I want these scenes to be pretty flat and everything kind of head-on to the camera.
The way I do my animated videos, is to take a scene like the ones you're about to create, and then place my character in it, facing the camera and then talking.
Here is an example ( https://youtu.be/VJJIGRdiXxA )
Please also find the attached images of screenshots I took from my videos to give you an example of the backgrounds I want created.

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Please find attached sketches of roughly what I am hoping to achieve.
1. Observation Room. This is like a giant science type base where they have a giant telescope in the centre that goes all the way to the roof. We are on a high-ish level with some computer desks etc.
Please try to make this look like a bit space-age and cool. The telescope is the main focus point.

2. Observation Building Exterior. Just to show a bit of scale, I would like a scene of that same building, but from the outside. I would like it built on a cliff-type area with heavy waves and sea below it. Please make sure to have the same telescope from before now poking out the roof. So you can clearly see it is some kind of observation building.

3. Garage. Fairly standard indoor garage setting. With a big wall with garage door at the back. Maybe the very front bumper of a car close to the camera. In the background near the garage door, I want you to do some kind of Tank vehicle. Similar to The Nolan Batman movies' Batmobile (I will attach a picture of that to give you an idea). Just a really superhero-style armoured car.

4. Office. Fairly standard indoor office setting. Please have a desk in the background with a bookshelf in the background. I would like you to do one of those trophy-head things that hunters usually have in their offices, but instead of an animal's head, please make this look like a comic-book monster's head or dragon or something that is clearly not a normal animal head.

5. Bedroom. Fairly standard indoor bedroom setting. Please have a bed in the background and any other normal bedroom type things. Please have a picture-frame above the bed (but just leave it blank, no picture inside).

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Please note, as with all the examples I have attached of my current videos, and the examples I sketched... Everything should be quite simple floor and then some sort of back wall in the distance. I need this so that I can take my animated character and place him anywhere on the floor, if you get what I mean.

Please do let me know if anything doesn't make sense or you need further explanation or clarification. I am happy to explain more if need be.