To me at my current knowledge level, this deal only works if taking over the loan - to limit the out of pocket money to acquire the property since the outside reno and new septic would take up the bulk of rehab costs. 

There's no cost to use, and currently $25 fee for applicants. 

The newest outdoor is still advertising 1st month free as they haven't filled up, and I spoke with the climate controlled owner/builder yesterday (he's a pretty big REI in the area), and he made it sound like he hadn't leased a single climate controlled unit since they opened a few weeks ago.I recently purchased a 140x45 warehouse with low ceilings and had debated doing self storage, but my market seems very saturated.

Just a fYI as that can be a pain (and a costly one)

I built a house and it’s going to be difficult to sell as I have no equity in it because of Cost to build.

Transferring the rentals into LLCs before marriage helps maintain separation and adds liability protection, but California’s $800 per LLC annual fee makes it costly.

So I would caution everyone to make sure the replacement cost for your improvements will realistically cover your actual replacement cost in the event of a total loss.

While using financing does mean I don’t keep 100% of the profit due to borrowing costs, it allows me to take on multiple projects at once and operate in higher price ranges than if I were only using my own capital. 

What add cost should they expect?

Good suggestions above.I would research the labor cost of a total resanding and recoating.