I keep track of all my saw purchases, parts purchases and saw sales on a spreadsheet. I've spent about $4000 on saws, $800 on parts and sold about $4000 worth. So I have about $800 invested into all the saws I haven't sold. Shouldn't be too much squabbling over that. My wife trusts me to be wise with our funds and it goes both ways. I don't worry about her purchases either because we're both cheapskates. Working for a non profit for the last 16 years, that is an important survival tool. Our combined income now is less than it was 26 years ago when we got married but we don't go without anything we need. God has blessed us.