I assume you don’t need more than a waist-up shot if you’re shooting in hotel rooms. You can buy a pop-up reversable green/blue screen that folds away like a flexfill. They come at around 6’x7′ and can hang from a lightstand with a couple of spring clamps. You want to light it completely evenly at about a stop below key and you want to get the screen as far from the talent as possible. Here’s what I use for my setup. A Lowel V-light (500w) for the background. A Lowel Rifa 55 (500w) for the talent’s key light and a Lowel Pro light (250w) with diffusion for fill. It all can work on a single 15amp circuit with room left to power a monitor.
This is the gear I use because I already have it on hand. If you want to shoot under cooler temperatures then you should consider Kinos.
Mitch