What the specific amount of income you want to create (monthly cash flow or annual amount)?

If you are at market you need to do a rent increase annually to keep up with the annual cost of living index/increased expenses.

A side question: How would one get their existing properties into any SDIRA if the value exceeded the annual contribution limit?

However, what is required on an annual basis?

Again, I can't pull up my reports right now, but annual property taxes is $802.

on this one we did  on 7 new street with all the requirements there its almost triple to build.. but that one will have all sub zero wolf etc.. this one is just medium grade on appliance packages.WE sold one of our new builds in North Charleston to the family that owns the company that makes the custom counter tops though.. so those are cool and we got good pricing.. 

I would bet 4plex 203k (refi later to get out of lifetime MI) would be better if you plan to stay in one location for at least a few years. technically, I think you have to live in it 12 months, look into current regs, you might be able to rinse and repeat annually.

There are returns of over 150% annualized ROI, using a figure of 3.5 months from purchase to resale.Is there any way to even come close to this ROI with renting anything?

USC charges $40,000 annually for tuition, how do you justify $40,000 for 4 days.

Based on it's opportunity value you would be losing a minimum 5% return annually.