My goals are to do wholesale deals, and own residential and storage property.

Daniel Alfaro Can you add a storage unit and charge $150/mo?

This is mixed use as well as storage would be mixed use.. so check your zoning.. and insurance.. 

Regards,GB

I've bought 3 houses in the past 20 months and have an offer in on a 37 unit self storage facility.

BP - My reasons behind writing this post are to track my own progress, get other peoples best practices, and give updates along the way so we can all learn.I am doing my first direct mail campaign focused on self storage facilities in Minnesota.  

That unit is a little run down and is just storage for the current tenant.

If the rental is a residential unit, then you need to treat it as such whether he's living there or not.If the rental is a storage unit, then it would fall under different laws.What @Aaron Mazzrillo said makes sense.Everything's negotiable.

Unless you are able to open up the closet space where the water heater currently is (assuming it is indoors) and use it for more living or storage space creating value of usable interior space, then I don't see why you would want to spend more money on tankless as opposed to the less expensive tank heater.

The problem with a small spaces/ tiny houses is storage.