My main concern is the interest rates being so high now as to whether what I'm hoping to achieve is really even possible. 

BiggerPockets also has a calculator to analyze deals, and I highly recommend you start this as soon as possible, even if you are not ready to buy.

Be sure your lender is comfortable with this, as many fear giving folks primary loans for properties they view as having a high probability of being turned into a purely investment.

I like the idea of live in flips, but it's something that I would wait until the kids are out of high school before I did it.

Use caution when borrowing against your stock portfolio, especially if it's a high volatility portfolio comprised of individual companies.

:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+ (roughly 5% probability of default), zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680 (around 10% probability of default), some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

I would highly encourage paying a GC to walk deals out the gate, have them give a scope of work so you can see what items costs.

Highly doubtful that there is a NNN lease equivilatent for residential properties.

Sure, mortgage insurance eats into your cash flow a little bit if you're putting less than 20% down but in the scheme of things it's really not that much.Also, you won't have 20% equity in your property in a year assuming you put 10% down unless you are forcing appreciation or you somehow get some high market appreciation.

Start with durable, high-quality basics: plush towels, soft linens, and a fully stocked kitchen with sharp knives, pans, and essentials like oil and spices.