If you are flipping a house, in the interest of time it sometimes makes better sense to hire some/all of the projects out - but you have to have built those costs into your model before you bought the house.

Yes, financing will be part of your financial model but the terms of your debt will be different from the current owners.The financials will have a lot of information that you may not need.  

Does FEMA has new base maps that is better and more accurate then what they had before, or did something else changed in their models such as vertical datum etc...?

I know several other agents who do this sort of model with investors.  

You can a single brand and different models.

(Not an investor yet) Aspiring Real Estate Investor?

I am warm blooded so I can't stand it and was miserable.The A/C guys said sometime the older models just can't keep up when it gets really hot.

Are there no places that are a bit more reputable that can train an aspiring investor?

But then while I'm thinking the details of selling 3-4 SFH, and with all the time restraints how is possible to acquire a bigger property that suits your business model at that time period?

There is a reason why the biggest builders in the world spend 2 to 3 million dollars for furnished models to sit and attract buyers.