Go to the CSLB website and much is outlined there.1 Lots of businesses including construction companies shoot for 20-25%, the higher the margin with increased volume=$.2 Most B1's that I know started as framers, some in concrete, some from underground construction.

Concrete is naturally pourous.

Consult with your tax advisor on the requirements so you are compliant with tax laws.

.), or the potential for sqft to be efficiently added during the rehab (screened porch, carport, concrete patio area, etc.).

If you want to get into the market for the appreciation play and are willing to negatively cash flow a bit you could consider a negative DSCR loan.I’m still very new so my decision would be based on factors that aren’t concrete yet (I.e. my goals) therefore long distance REI isn’t off the table.

@Michael L. typically, a GC will pull a general building permit for the project and then hire subs (foundation, concrete, electrician, etc.) that will pull task specific permits as the local municipality requires.So, the GC will need a builder's license, maybe something even "above" that.

Let me know your thoughts, just trying to hash out a concrete plan. 

It could be something simple like making sure you have a legally compliant lease, or how to properly serve a 3-day notice for late rent, or could be more sophisticated of how to communicate with residents when their 4-year-old shoved their toy in the garbage disposal and they don't want to pay for it.

I took over a small home with a previous owner animal that peed everywhere and it seeped into the sub concrete.

As I have mentioned before, we always try to stay with our "Team" whether sales, excavation, buildings, erectors, concrete, banking etc.