The tenant demanded the Sunday night emergency service, which i declined and TOLD her (not asked) that the furnice guy will be there on Monday morning.

I don't know why you would think a tenant requesting notice before you accessed the property would be an "unreasonable demand".

Northern NJ has options as well, but MTR works better in a lot of areas because there is demand.

Yes, taxes and insurance are higher, but Tampa has strong rental demand, and you can still find properties in growing areas just outside the city where cash flow is realistic.

There is nothing about how long you need to occupy the property for.So unless our lender puts a demand on us I see no problems legally in occupying each property for any amount of time to fulfill the requirement, then rinse and repeating this process up to our full entitlements, so long as the lender is willing to keep giving us loans.

Flipping with someone experienced can be invaluable, especially when you’re new to navigating contractors and timelines.Researching Out-of-State Markets: For a duplex, consider markets like Phoenix or San Antonio - investor-friendly with strong rental demand.

Supply & DemandUnlike financial markets, real estate prices and rents are driven by supply and demand.

I don't know the city well, but seems to be light on demand drivers other than Baylor University. 

He began taking the tools out of the house and demanding he receive money.

Pent up  demand is a farce, you want to rationalize what is legitimate demand.