Make a plan and budget
Get design ideas online from sites like Pinterest. Be sure to understand the limitations of your space. There may not be room for the design you would like. Take measurements and make a draft design
Hire a professional
If they have a quote back to you within a few hours that can be a red flag. Why did they have time write your quote so quickly? Was there enough time to shop around for different supplies? Have they had time to really consider the projects demands? When you get the quotes back, compare them. Go back online and check them again. At this point, you should be able to find your fit based on reviews and price.
If there happens to be a fire, it could be difficult getting out of your home if you have everything piled up. The last reason that it's a good idea to remove items from the home is to protect your valuables. Expensive artwork could be damaged and keepsakes could be ruined. It is better to take them to a safe place, whether a different room or different location.