Most standard washers / dryers are ~27in on their minimum dimension, and the only doorframe to the room happens to be 26in wide.

Find similar properties in 1 mile of the property that recently sold with similar dimensions such as bed count and bathroom and basement.

Find similar properties in 1 mile of the property that recently sold with similar dimensions such as bed count and bathroom and basement.

Find similar properties in 1 mile of the property that recently sold with similar dimensions such as bed count and bathroom and basement.

The duplex next door which on the assessor's website is the same exact dimensions as mine came in at a slightly lower assessment amount.

put some standard dimension furniture 60x80 bed in it and you will see.  

The vacant parcel was listed at 7 acres but the math when looking at lot dimensions was over the 7 acres listed.

From flips you can move to BRRRRs and apply what you already know from your flipping experience and add the new dimensions of learning the rental and property management side of investing.If you're not handy (no shame in that) or don't have much time on your hands, it may be best to stick to turn-key buy and hold investments in single family, and hiring out property management. 

How long is the rear wall where you want to create the opening (out to out building dimension)?

Lots of the exact same dimension are being sold in the neighborhood for almost $300,000 in 2020.