Most of the regular posters here on Bigger Pockets have a negative view of Sub2, especially after a couple of individuals spammed the site to promote their training.There was already a negative view of Sub2 on Bigger Pockets due to most of the regular posters did their deals in a different manner therefore, as is human nature anything out of our own personal preference can look mighty sinister. 

If anything’s not up to code, you’ll need to fix it before they sign off.As for costs, you’ll have permit fees—those can range from a few hundred to a couple of thousand dollars.

In The Millionaire Real Estate Investor, it profiles a couple who used this strategy.

I am all "invested out" I believe, got into many projects over the last couple of months.

If you sell it now (or within a couple of years), you won't have to pay that. 

When I replaced the furnace a couple of months ago, I also installed a new 7 day programmable thermostat.

Couple other things to consider, property / school taxes are high, and tenants have lots of rights.

My wife and I just recently started investing in the past couple of years and have a MTR duplex in WI but have been contemplating the Duluth market. 

I had one give me a $1795 on one property and another one give me $1600 on the same size house just a couple blocks away.  

I was a Moderator for a couple of those years as well.