I recommend that you purchase beds that have the storage underneath, a great place to put the extra bed linen, towels, your private belongings if renting out the property.
Also have a bed that has enough room underneath to put the suitcases.
Always measure up before buying furniture, not great if your furniture takes over your lounge. Furniture packs are fine as long as you are dealing with a reputable company that can advise you on the right sizes.
Single beds with a pull out mattress take up less room than 2 single beds.
Use mirrors to reflect light and make the property living area feel large.