@Austin Shute if you intend it to be storage for the whole building, you'll need to figure out how to connect it to the common areas / hallway so all tenants can access it.But usually what folks do in this situation is combine the top floor with the closest unit and make it a bigger unit (a "townhouse" unit), rather than using a top floor for storage for the whole building.You might have to remove a door or two to connect the two units so the building inspector doesn't think you're going to keep renting the top floor as an illegal 5th unit, but as long as that's done I think you might be able to keep the bathroom up there.

As an investor who is buying, the appraisal is only relevant to you if you are getting a mortgage and as long as you are paying less that's what you want, but you also need spread to achieve the ARV.

As long as the numbers still make sense after the cash out refi, then I see no issues. 

As long as the cars aren't all on blocks, then that's not really an indicator of neighborhood quality. 

Doesn't cost anything as long as the tenant uses a bank account and not a CC. 

As long as your proceeds from the relinquished property and the cash into the replacement property are the same or greater, you should have No Boot to pay taxes on.Man you are a brave one! 

As long as they get their payments they are happy.

Further, I feel like I would really enjoy the business side of real estate investing as long as I could outsource all of the renovation, property management, design work, landscaping, cleaning, and maintenance.

But as long as rents stay steady, you should be fine. 

This seller is very hands off and doesn't want to repair anything which is ok with us as long as the sales price reflects that.