Now you have seismic resilient with fire preventative. 

It is imperative that you take this action to prevent fines and legal issues.

Where it gets interesting is that the house has 5 mailing addresses associated with it and the fire prevention bureau has on their records it is also a 5- unit house, and I am billed as such upon annual renewals/inspections.

If the tenants are the issue, they can make it very difficult to show the property and this can create a lot of issues for you during this time.It will also prevent you from selling your home for maximum market value as only few people will want to deal with holdover tenants.

It also prevents you from making the #1 noobie mistake, which is buying in the hood just because it's cheap.

The foundation was already approved, permitted and finaled years ago for a 3400 sf house, and its solid and I won't be building directly on the overhang edge; but rather back away from the edge a few feet to prevent any load issues all the weight will be on the longer sides of the existing footing.

I don't think we will be able to afford a 1.5M+ mortgage without a huge down payment (sale of our house).I feel this would be going backwards as we would focus on one property preventing us to do other things.

Condo bylaws prevent airbnb usage, so not that.

Newer construction code requires better earthquake-proofing, but it's still aimed at preventing a building collapse rather than holding the value of the structure.About 15 years ago there was all the talk about "100 year homes" but I haven't seen much come of that.

This can help reduce risk and volatility by preventing overexposure to a single asset class. 1031 is only for investment property.7) Deprecation Schedule resets when the property is purchased in partnership with a DST.