It has its own court yard that could be used as a glass-covered atrium with a common area for people to relax.

You make your money when you buy, so you want to buy low enough to have enough margin to cover rehab plus your profit at the end.

Then 10 years into it, my cash flow was up to $30K/year, including covering several thousand a year in small nuisance repairs.

It's all a game of creating barriers of exposure to your other assets and if you have a big enough accident at your property, insurance will not cover it most likely. 

Plus, you'll want to create an upfront operating account of 1% to 5% of the purchase price to cover unexpected expenses before you've accumulated enough money for the $250 to $300 savings.For SFRs or smaller multifamily, as you said, it depends.

@Gab Loo @Hannah Peerbolt wrote a good blog that covers a lot about what to look for in your property manager.

My goal is to do a full 20, get out at 42 years old, and be done working with enough money to cover expenses + have ~$10K/month excess.

Paid Already by or on Behalf of Borrower at Closing $82,304.75 01 Deposit $1,000.00 02 Loan Amount $81,304.75 03Existing Loan(s) Assumed or Taken Subject to 0405 Seller Credit Other Credits 06 07 Adjustments 08 09 10 11 Adjustments for Items Unpaid by Seller 12 City/Town Taxes 13 County Taxes 14 Assessments 15 16 17 CALCULATIONTotal Due from Borrower at Closing (K)$108,556.47Total Paid Already by or on Behalf of Borrower at Closing (L) -$82,304.75Cash to Close From To Borrower x$26,251.72CLOSING DISCLOSUREM.

I've just recently began to implement the owner financing and Subject-to opportunities in my options when offering on deals, but would I be able to do this with pre-foreclosures?

This is where I live - my 3 apartments cover my mortgage and I am in essence living here “for free.”