When buying something as big and as important as a home, it is very important to always think things through and be as informed as possible so as to make little - or better yet, NO - mistakes. It is best to be a discerning buyer who knows his / her stuff so you are empowered to make the right decision and determine what home you really like.
 
First off, you will be much better off at least consulting a real estate agent for some basic information on how the current real estate industry operates. Especially these days when real estate values are a bit unstable, you need expert advice as to what to do when problems arise, or better, be able to avoid encountering these dilemmas.
 
Also remember that the deals behind buying a house isn't as simple as paying, then you can move in. Buying a house involves several steps, including a short period where you can still back out of the deal if ever you change your mind, before you can call your moving company to move your things from your old place to the new one. You will also need to have your financing plan in effect so that everything is on order before you move in.