Extra risk factor on a very slim profit margin.

I looked at a few videos and was warned that because the system is so old, the chances of getting it apart and back together are slim, and it's probably best to leave it alone.

You: 60% (Low) - 80% (high)Her: 40% (high) - 20% (low)I do think 90/10 is on the slim side.

I'd really like to find something within 15-20 miles of the Andover area as the commute from Central MA daily has taken it's toll on me over the years.My budget is about $325k with about $10k down, although I have been approved for upwards of $400k on a single family, and most calculators online state I could afford $450ish, but I'm not sure i'm comfortable with a mortgage that high.Anyone from this area will be aware that it's slim picking if at all in this area for those prices.

I would not go too slim on the margins, or you can easily find yourself negative for the year.Fortunately, there have been some regulatory revisions this year to how assessments are be done, which should give us some relief.

The chances that you followed all of the guidelines are very slim as even seasoned "lease option" people will not do them in Texas. 

Chances of this are very slim as it's a fresh note not secured  by the property they are selling.2.

We do have 3 other rental houses that net us $750 profit a month but with such a slim margin of clearing the mortgage we are questioning the deal.

I got a rough estimation of ~100k to build a 1,000sf unit (if I keep costs slim).

A lot of the time, renting out the unit at market value gives you a very slim margin, but there are definitely different strategies you can utilize the mitigate this.