@Paul Bergagna  no I’m not saying that the conversion would decrease the value of the property as a whole.  

There are credit forums with all of the tips needed to increase your score (keeping accounts open, increasing credit limits to decrease debt ratios, disputes, etc).

Our plan was to make his mortgage payments for several years while we rent the place out, in which time the house value would appreciate while the mortgage balance would decrease, creating room for profit in the end.The value of the property at the time was about $105,000 and he owed $101,500.

Especially for a front-ended note with a conservative LTV.That said, how would I DECREASE the note buyer's return to a more reasonable 12% or so? 

Quick turn overs of units (with a scale of decreasing payout for turnover).  

This is based on being able to increase your NOI buy increasing income or decreasing expenses. 

As a follow-up to my own post, this is the verbiage I'd developed, which others can comment on:The increase in value of Separate Property, regardless of whether such increase or decrease is due in whole or in part to the direct or indirect contributions of either party and whether such increase is passive or active.

We know the LLC is running payroll, so there should be at least wages expense, payroll expense, and payroll taxes expense to decrease the gross number. 

By how much ($ amount) is a property ARV increased or decreased by having (or lacking) additional bathroom?

The upward trends may appear to be slowing, but home prices typically do not “decrease” without some sort of direct cause.