Total turnaround time can be within the same month if you start at the beginning of the month, but don't be surprised if it continues into the next month.S8 in my area outsources the inspections.

Most companies marketing with the word outsource some of the pieces you described above - in particular, the management on the back end. 

For the truly ambitious, the right site could then be further developed (outsourced) as a "green cemetery," which I refer to as "selling $500 post holes" at a few thousand per acre.

I am happy to pay a competent firm to keep me from violating the terms of my plan and answer questions, but somehow I fear that no one will want my account because the banking part is outsourced to Titan Bank (which is not paying interest, so I should probably switch from them too) and perhaps there are no custodial fees to be had the way this plan was set up. 

For example, if a person owned an apartment with 10+ units, would it be better to outsource everything to a property management company?

Additionally, consider operational costs like cleaning, staffing, and marketing, as they can quickly add up.For management, outsourcing to a professional property manager or leveraging tech platforms for bookings and operations could streamline things, especially if you plan to scale.

Acquisition people, asset managers, finance/accounting roles are all needed to run properties, even if the property management is outsourced.  

Self-managed but outsourcing repairs and maintenance 8%, self-managed DIY repairs and maintenance 10%.

I do outsource my Taxes, but I meant having a Real Estate Tax Accountant or a CPA who I chat with to help create me a long term strategy.

This is often one of the first things a real estate investor will outsource.