I closed that property with less then 1% down of my own cash.

Again you can buy more properties in lower asset class area, but it's less efficient.There are many threads about appreciation, so i won't repeat it here, but my guidance to you is to think through the difference between appreciation and inflation. 

Then your sale will be for $450K ish (you do subtract closing costs). 

To this day, I still use the BiggerPockets Calculator for everything from 2-4 unit properties all the way up to the 224-unit portfolio we're working on closing this February.

it will be a corporate/wellness retreat/short term rental destinationI need land that is close to the Action, but not too close, and preferably comes with two single family doors already built, so I can take advantage of Fannie Mae owner occupied loan and develop the rest of the land on my own and with private funding.Is Columbus a good market for this strategy?

Quote from @Account Closed: Honestly have no clue, but my guess would be contact a lawyer who specializes in real estate.I am also trying to get a hold of other wholesalers in my area and real estate agents.

Close friends?

I am looking to partner with a close friend of mine (we've worked together many times before with both of us in various roles) to primarily do rehabs for LTR and/or resale.

Account for all costs, including closing fees, holding costs, and repairs.

@John Friendas  it's close to the 1% rule which is good, but I would still run the financials on it.