If I scale to a point where I no longer have time and have to outsource, that line item is already accounted for and the property will still be profitable.  

The list goes on.For mission-critical items, you want quality, not cheap.

Due to item 1, adding an ADU can require years to start achieving any return (once the accumulated cash flow recovers the initial negative position).4) Adding an ADU is a slow process.

Having a GC that will provide good documentation, itemized receipts, etc. will make the process much easier I've noticed. 

I think by waiting to last minute to put things together you miss items and year end tax planning becomes problematic.

Another thing we do is check to see what items need to be addressed.

You can get some estimates from contractors for what they charge for big ticket items like to renovate a bathroom, renovate a kitchen, replace the furnace, replace the roof, etc.All wholesale deals should have free and clear title and you should be able to see the sales agreement before submitting the earnest money deposit.

>I have heard wholesaling is tough but despite having less volume it has larger spreads in San DiegoI have never wholesaled but I suspect you have both items correct. 

Items or features in this quadrant that aren't there won't be missed, but if they are there, they will be expected to operate perfectly.

The other contractors that I have worked with gave me a full scope with detailed line items of what will be fixed, how much the labor is and how much the material is going to be.