Costs associated with performing note investing

[Omri Liba]

Hi All!

New to the forum and the note investing world..

I'm looking into building my excel template for analyzing IRRs of performing (1'st lien) note investments 

Can you please elaborate on the costs associated with buying the note, maintaining it through its life time and eventually when deciding to sell the note or when the mortgagor refinances or pays of the debt?

Thanks!