All of those are variable on a homebuilt,especialy one built from plans.The only way to get the values is to measure them on your actual example.
If your one is currently flying it should have a valid weight and balance sheet. It should also have a limitation sheet as to which aeros it is approved to do.
Without being rude , the fact that you have asked these questions demonstrates your lack of knowledge of the areas that are most likely to kill you. Is this a plane you own or one you are considering buying?
I would suggest that you seek local specialised advice to help you understand what you are getting into, there is bound to be someone in the local strut that can help.
Where are you based?
