I'm all new to this chicken raising and very excited! I've been given a coop but it has no floor. Previous owner just had it on ground I'm wanting to have someone make it a floor then also legs to get coop up off ground so chickens can under for shade in our TX hot weather. Question is what is the most affordable way to have a floor built? Does it NEED to be pressure treated wood? Being on a fixed income I'm looking for a affordable way. Thanks in advance for your help!!