Do some 3D Modelling

Hi, I need to use an image (png: 1320x900) of a room as a background of a software project. Already have the room image. I need to add the image of a person with the style of a suit super skin (non feminine, non masculine model) in dark grey color. I would like to show the model in 7 different positions so I need 7 images of that model. 7 images: 1- Lying back in the bed, in the center of the bed 2- Lying front in the bed, in the center of the bed 3- Lying left side in the bed, in the center of the bed 4- Lying right side in the bed, in the center of the bed 5- Sitting in the bed, in the center of the bed 6- Standing on the floor by the left side of the bed 7- Lying on the back on the floor by the left side of the bed So we need a 3D model that will fit the bed dimensions and to make the 7 images of the model so that I can put it over the room image to show the model in different positions. So the 7 model images must not have a background so that we only see the model in the room, no background. See the image of the room attached. We will need to validate the model before the work in done. Thank you