I know that could kick them out and raise the rent to 750/700 while just doing minimal clean up and do very well for cash flow and cash on cash which is all I care about. 

Also, I would encourage you to try for FHA to minimize your down payment.

.- build your credit (no more minimal payments, open small accounts and pay the statement balance in full)- build your capital (as a freshman in college, I know there is a need to go to social gatherings, etc. but save now/make it big and soon you'll be invited to all the social gatherings)- connect everywhere. awesome of you to start here at BP.

Does anyone have any advice for which type of company (LLC, S-Corp, C-Corp) would be best for this in terms of liability and minimizing tax liabilities?

The property needs minimal rehab.

Or maybe they just think it's a hot property and they don't want to waste time.Three days isn't much time to inspect and then negotiate unless you're well-qualified to complete the inspection on your own.

I just had an offer accepted on a duplex in the 13203 zip code.Both apartments are 3 bedrooms, needs minimal work, and the 1st floor has been there for 10+ years.

Thanks @Irfan Raza and @Joe WhiteI have turnkey properties that require minimal (if any) maintenance though, so if possible would like to continue managing them (avoiding other fees/costs whenever possible).

The point where I would stick it out for a year as an owner occupant to do FHA financing and take advantage of the minimal down payment, but my wife feels otherwise. 

Your flipping business should be an S corporation to minimize tax consequences.Rental properties should be in an LLC.You should really have a Roth IRA to do some of your wholesaling.