No unregistered vehicles and no vehicle repair on property is in the lease (although I wouldn't have a problem with emergency battery and tire situations, I prefer they don't change the oil on the property. 

Or it purely doesn't matter at all at this time and roi should only be looked at before purchasing a new investment? 

If you're thinking of it purely for management and not as the deed holder, it might not add the protection you're hoping for.

Tenants that always call about everything are a pain, but tenants that never call are even worse for your bottom line.2) Replace smoke alarm batteries.

3) do you want personal use out of it, or is this purely for investment's sake?

So someone who is looking purely to maximize potential return (and has unlimited time) is unlikely to find this a good fit.Hope this helps.

Keep track of what items are purely for the rental unit and what items are for both units.If it's an item that is technically for improvement of the whole house (landscaping, common area improvements, exterior siding/painting) you can only write off a portion.

This will be pure cash flow of 12% return per year.

@Abby Flynn if you are buying a pure rental, yes LLC is worth it.

Don't buy it purely for any one reason.