Let's see: You sell one property, and to avoid paying cap gains tax, you then reinvest those profits within 45 days into a larger "like kind" property.

In general, any time you have profit or depreciation recapture that would cause a tax. 

Ahshar Sylvestre Code violations are a great source of lead generation.

Let me add some new wisdom to this.Try not to see social media as "just another channel to try my luck".It is not a separate thing, especially doing SEO or paying for ads.When it comes to lead generation, it is not (just) about generating that lead.

Having fewer but better properties will be more profitable in the long run.

You make revenue here and there but the goal is to generate enough in the winter to sustain all the expenses for the entire year. 

Likely not allowed in the lease and if the landlord were to allow it they will partner with you and take a good chunk of the profits.

When you add rehab costs and effort, holding costs, and selling cost there is not much profit. 

If you already have that where you live, why put those profits at risk?

You may be profitable, but I'd prefer to avoid the possibility of having to do unnecessary repairs or not holding my tenants accountable for damage when I know their actions might have caused any unforeseen damage.