I would use all 3 plus look at properties currently available for rent that are similar to what you are trying to comp (3 bedrooms/2 baths; similar condition; size; etc). 

It is a 6 bedroom and while I see a couple of sales in that 1.6 to 1.8 for 5 or 6 bedroom in that size, that seems to be few and far between.  

The current landlord for this property is kind and is more willing to pay for replacements on the home which I believe is mainly because she used to live in the home so I didn't really need to spend much for any problems that arrived other than minor things the home is over 150+ years old so it has its quirks.The tough part is that I am paying a bit more in rent for this home but it has a lot more potential than my other unit, it has a good-sized backyard which I'm debating on adding a hot tub or a fire place but seems like a fireplace may be better maintenance and cost wise.

As one who personally had a medium sized HML company going into 2007 2008 with 600 loans on my books and by 2010 went through a massive re value melt down all of us in that business got hammered for us we started in 2001 and by 2010 had to basically shut down let go 90% of staff and spent 3 to 4 years hemorrhaging our net worth's to make sure our banks got paid ( which to my personal financial situation was devastating) Most of my peers went out of business completely ( BK) I did not but by 2011 I was basically starting over.

The point being: it can be just about any size you want.  

This question is definitely very location dependent - licensing across state-lines is a tricky thing to navigate so depending on the size of the lender they may operate in one metropolis or all over the country.

You can also just accept certain kinds of pets, breeds, or sizes as a third option.

If my husband and I were to start over again we would buy higher quality assets and not be focused on immediate cash flow and unit count like we were when we started this after exiting a fairly decent sized small business.

Here are the common exceptions:Relocation for Work: If your job requires you to move a significant distance from your current property (usually over 50 miles), you may qualify for a second FHA loan near your new workplace.Increase in Family Size: If your household has grown, and your current property no longer meets your family’s needs, you may qualify for a second FHA loan to purchase a larger home.Co-Borrower Separation: If you co-signed on an FHA loan and are no longer living in the property (e.g., after a divorce or separation), you may qualify for a second FHA loan for your primary residence.Non-Occupying Co-Borrower: If you were a co-signer but did not occupy the original property, you may qualify for another FHA loan as the primary borrower.Important Note: FHA guidelines typically require you to demonstrate that the current property will not meet your needs or is no longer feasible as your primary residence.2.

We use carbon copy in letter size (legal size is just a pain).