The management companies & local investors usually lease places up within 1-2 weeks max (depending on if you want to hold out of higher rents) How would you think about leasing these out? 

You didn't mention where you are operating, but depending on average home prices, I think you'll be ok.For instance if we're talkin $500k homes, and if you will get a 2.5% commission, split that 50/50 with your Broker, you will end up with $6,250 per sale, right?

Do you need an S-Corp depends on your overall tax situation and profit you are expecting form this flip.This post does not create a CPA-Client relationship.

Here's an article with things to consider when selecting a cost segregation company.

If you have a good FICO, a decent down payment and closing costs, go ahead an do the first one. 

People really value a spa type of treatment and depending on where you are, it could make a real difference. 

To save those costs, you might want to stick to some year build and older, for example, if you cannot do inspections on the properties that you are buying due to off-market deals or something else that is hindering you (all sellers I buy from do not want anyone in the home till we close).

Figuring out the true cost will heavily depend on the type of dig down, depth, and total square footage. 

Depends on the area and type of system you want.

It depends on who you're hiring but that seems fairly standard.