Don't get too complacent in this unpredictable housing market; always be looking for your next tenant.Incentives - Use incentives to attract quality tenantsLook for creative ways to attract tenants by including free incentives in the rental price.

Depending on the improvements you've made, you may have a good amount of equity in the property.Brandon Turner's first property was a live-in-flip, as described in THIS ARTICLE.My biggest concern would be over the dust/dirt factor during construction.  

The biggest challenge was the basement.

I am also considering either lowering the rental price (below market), offering incentive (pay for some of move), and/or considering allowing pets. 

The seller(s) may now have greater incentive to sell than before. 

What is the best piece of advice you would give on getting through the next turn and what was the biggest mistake you saw an investor make that didn't get through it?

But I feel like these both could easily get worked out by planning for it when running the numbers and also putting in place a higher security deposit to give extra incentive to the tenants.

The biggest key to Real Estate Investing is to Buy it Right... and Sell it Right...

For me, that was probably the biggest burden in the licensing process.

I am, however, thinking about giving early payment incentives.