Ummm... might be wanting to just try a wig frist. they are EXPENSIVE, time consuming, need to be redone every few months and can, after awhile, smell pretty bad even if washed reg.
Synthetic cost could run you 300-600 (again, every few months they need tightening)
Real human hair could run you well to 1000 or more if you want them long.
yeah, try a wig first.