I just wanted to say thanks for all you did to help me get this great house. You don't know how much I appreciate it.

 I'm a homeowner and I think without your help, patience and guidance, it might not have been. Thank you for all your assistance.

 [We] are forever indebted to you for making this deal happen. What a miracle worker you are!

 We wanted to thank you again for all your work and patience. You did an excellent job.