Sentence:  I say, since ye hae sae muckle consideration for me, I'se be blithe to accept your kindness; and my mother and me (she's a life-renter, and I am <WSD>fiar</WSD>, o' the lands o' Wideopen) would grant you a wadset, or an heritable bond, for the siller, and to pay the annual-rent half-yearly; and Saunders Wyliecoat to draw the bond, and you to be at nae charge wi' the writings. 
Meaning of the word marked with <WSD> tags:  One in whom the property of an estate is vested, subject to the estate of a liferenter.