Things I want to upgrade/add below:-Add an additional BR by splitting the large den-Open up the wall that divides the kitchen and living room to add a small breakfast nook/island.

Still working on the outcome of a more efficient home with lower utility bills and design-friendly with minimal stairs.

Get one that need a bit of work (not talking about ripping out kitchens or knocking down walls) and see how you do with a small project first. 

@Jennifer BuchananSome of the things that need to be done are:Removing cigarette odor and painting wallsReplacing a toiletInstalling new locksResecure kitchen range went hood pipingKitchen and bathroom counters need to be recaulked.Replacing blindsReattach a cabinet in the kitchen

For me, historical homes are very popular and I grew up learning everything about the owners, neighbors, design, etc.

This is great for high income earners because normally the added income will be taxed at your marginal tax rate.With that said, real estate investing won't likely decrease your taxable income unless you or your spouse were designated as a real estate professional.

Kitchen grease is "super food" for mice. 

It is technically a single family home but built in a unique way to where 3 sections of the house have there own exterior entrance, kitchen, private bathroom/bedrooms.

ex. kitchen, hallway, living room and outside entrances?

The septic system is designed by number of bedrooms, not toilets.