I’ve been studying wholesale real estate for the past few months, and I’m excited to dive in and start finding properties and connecting with buyers.

For sure, it is a long process, and it you are converting a basement or something, mot likely to fail.

I then modify those numbers based on the buyer's preferred down payment/return hurdles.

It's failed in grand fashion every time, for good reasons but hey feel free. 

If not they could spend money and time and offend buyers if they update the property incorrectly.There are other options, such as landlording.

and only close IF they find a buyer to either pay for the contract assignment or pay a higher price for the property?  

They see foreigners as one-off buyers so they're not too much concerned about building a relationship or their reputation in the eyes of somebody who doesn't live there for that matter.

This amounts to lost opportunity because if you had purchased RE, at the closing it can start producing return. 5) ADUs detract from the existing structure whether this is privacy, a garage, or just yard space. 6) this is related to number 1, but there are many more buyers looking to purchase homes for their family than there are RE investors looking to purchase small unit count properties.

Same with Myers home buyers, they put out alot of good homes too.   

I have used RentecDirect for a few years and it has not failed me.