However what happens when the tenant vacates and now the unit has to be turned over/takes a few months to find a new tenant and during that same period of time the sewer line goes and you get hit with that $15,000 cap ex expense in addition to the vacancy and turn over costs.

Upon BP member recommendations, my husband got his real estate license which now helps increase our access and decrease our transaction costs.

Whether the seller was open to a buyer commission or not, I wouldn't put an additional cost into any personal purchase.  

If any costs go up, developer eats it.

This will cost you money on the back end.

A) it controls my cost.

Make sure your rehab is "renter" cost rehab. etc. 

There is more maintenance cost when they are small keeping the grass down.  

I would guess an older home might be more cost to insure?

Am I more likely to be able to add $50k or $100k of value above cost in a high Cost RE market or a low cost RE market?